Having problems with removeEventListener with two different MouseEvents

Question

I'm trying to get the children of _banner to do 2 things simultaneously, and I'm not getting it to work properly. I wanted them to all tween down the stage (navTween2), and remove the first MouseEvent listener so I can use a second one to execute a separate method on another mouse click, but it keeps firing off the onClick1. I'm currently testing this on the navHome iteration of _navButton before implementing it across the rest of them. What am I missing? Any advice would be appreciated
package {
    import flash.display.MovieClip;
    import NavButton;//load nav class
    import flash.events.Event;
    import fl.transitions.Tween;
    import fl.transitions.TweenEvent;
    import fl.transitions.easing.*;
    import flash.net.*;
    import flash.events.MouseEvent;
    import flash.text.*;
    public class ZDSite extends MovieClip {
        private var _navButton:NavButton;
        private var _banner:Banner;
        private var total:Number=stage.loaderInfo.bytesTotal;
        private var loaded:Number=stage.loaderInfo.bytesLoaded;
        private var banTween:Tween;
        private var banTween2:Tween;
        private var navTween:Tween;
        private var navTween2:Tween;
        private var xmlLoader:URLLoader = new URLLoader();
        private var xml:XML;
        private var xmlList:XMLList;
        private var navX:Number;
        private var navY:Number;
        private var navSpace:Number;
        private var fadeIn:Tween;
        function ZDSite() {
            //Run preloader
            addEventListener(Event.ENTER_FRAME,loadSite);
        private function loadSite(event:Event):void {
            Bar_mc.scaleX = loaded/total;
            txtLoaded.text = Math.floor((loaded/total)*100)+"%";
            if (total == loaded) {
                removeChild(txtLoaded);//remove from stage
                removeChild(Bar_mc);//remove from stage
                removeChild(plBracket_mc);//remove from stage
                removeEventListener(Event.ENTER_FRAME,loadSite);
                trace("site loaded, starting opening animation and executing nav build");
                IntroAnim_mc.addEventListener("imdone", createBanner);
                IntroAnim_mc.play();
                xmlLoad();
        //add banner
        public function createBanner(event:Event):void {
            IntroAnim_mc.removeEventListener("imdone", createBanner);
            _banner = new Banner;
            addChild(_banner);
            _banner.y = 1152;
            banTween = new Tween(_banner, "y", Back.easeOut, 1152, 155, .5, true);
            //Execute createNav AFTER this tween is done
            banTween.addEventListener(TweenEvent.MOTION_FINISH, createNav);
        //load XML for nav buttons
        private function xmlLoad() {
            xmlLoader.load(new URLRequest("data/navigation.xml"));
            xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
        //check to see if XML is loaded
        private function xmlLoaded(event:Event):void {
            trace(event.target.data);//show the raw XML
            xml = XML(event.target.data);
            xmlList = xml.children();
            trace(xmlList.length());//show the # of nodes
        //add the nav buttons on the stage
        public function createNav(e:TweenEvent) {
            //set nav start position and spacing here
            navX = 130;
            navY = 330;
            navSpace = 5;
            //add nav buttons per XML data
            for (var i:int = 0; i < xmlList.length(); i++) {
                _navButton = new NavButton;
                addChild(_navButton);
                //name each instance per XML data
                _navButton.name = xmlList[i];
                _navButton.x = navX;
                //Animate and fade in each instance of _navButton
                navTween = new Tween(_navButton, "y", Elastic.easeOut, 600, navY, 1, true);
                fadeIn = new Tween(_navButton, "alpha", None.easeNone, 0, 1, 1, true);
                //change text in each iteration of _navButton per XML data
                _navButton.navTitle.navText.text = xmlList[i];
                //add space between navs
                navX += _navButton.width + navSpace;
                trace(_navButton.name);
                //add event listener to each iteration
                _navButton.addEventListener(MouseEvent.CLICK, onClick1);
        //Set onClick function for each nav button added
        function onClick1(event:MouseEvent):void {
            _navButton.removeEventListener(MouseEvent.CLICK, onClick1); //this isn't being removed, why?
            banTween2 = new Tween(_banner, "y", Back.easeOut, 155, 300, 1, true);
            navTween2 = new Tween(event.currentTarget, "y", Back.easeInOut, navY, 400, 1, true);
            //How would I implement navTween2 across all _navButtons?
            if (event.currentTarget.name == "Home") {
                _navButton.addEventListener(MouseEvent.CLICK, navHome);
            if (event.currentTarget.name =="Bio") {
                navBio();
            if (event.currentTarget.name == "Flash") {
                navFlash();
            if (event.currentTarget.name == "Print") {
                navPrint();
            if (event.currentTarget.name == "Web") {
                navWeb();
            if (event.currentTarget.name == "Art") {
                navArt();
        //button nav functions
        //Home
        public function navHome():void {
            trace("Home has been clicked");
        //Bio
        public function navBio():void {
            trace("Bio has been clicked");
        //Flash
        public function navFlash():void {
            trace("Flash has been clicked");
        //Print
        public function navPrint():void {
            trace("Print has been clicked");
        //Web
        public function navWeb():void {
            trace("Web has been clicked");
        //Art
        public function navArt():void {
            trace("Art has been clicked");

Answer 1

Ah okay, I apologize for the confusion at the end of the script there. What my intent is that after animating the navButtons after the first click, I am going to have them call in another movie clip from the library (e.g. the different portfolio galleries) when clicked a second time. I guess I didn't see the redundancy in trying to fix my original problem.
What this is, is my attempt to reverse-engineer this template I saw online using AS 3 and XML:
http://www.templatemonster.com/flash-templates/22017.html
I cleaned up the code a bit further, including your suggestions and I'm now getting closer to what I'm trying to achieve. My only remaining query would be the best way to get the navs to stay "up" after being clicked (as well as reverting the others back to their original state) taking into consideration that the over/out functions reside in the NavButton class from the document's class. Your help has been EXTREMELY helpful! Code below:
package {
    import flash.display.MovieClip;
    import NavButton;//load nav class
    import flash.events.Event;
    import fl.transitions.Tween;
    import fl.transitions.TweenEvent;
    import fl.transitions.easing.*;
    import flash.net.*;
    import flash.events.MouseEvent;
    import flash.text.*;
    public class ZDSite extends MovieClip {
        private var _navButton:NavButton;
        private var _navButtons:Array=[];
        private var _banner:Banner;
        private var total:Number=stage.loaderInfo.bytesTotal;
        private var loaded:Number=stage.loaderInfo.bytesLoaded;
        private var banTween:Tween;
        private var banTween2:Tween;
        private var navTween:Tween;
        private var navTween2:Tween;
        private var xmlLoader:URLLoader = new URLLoader();
        private var xml:XML;
        private var xmlList:XMLList;
        private var navX:Number;
        private var navY:Number;
        private var navSpace:Number;
        private var fadeIn:Tween;
        function ZDSite() {
            //Run preloader
            addEventListener(Event.ENTER_FRAME,loadSite);
        private function loadSite(event:Event):void {
            Bar_mc.scaleX = loaded/total;
            txtLoaded.text = Math.floor((loaded/total)*100)+"%";
            if (total == loaded) {
                removeChild(txtLoaded);//remove from stage
                removeChild(Bar_mc);//remove from stage
                removeChild(plBracket_mc);//remove from stage
                removeEventListener(Event.ENTER_FRAME,loadSite);
                trace("site loaded, starting opening animation and executing nav build");
                IntroAnim_mc.addEventListener("imdone", createBanner);
                IntroAnim_mc.play();
                xmlLoad();
        //add banner
        public function createBanner(event:Event):void {
            IntroAnim_mc.removeEventListener("imdone", createBanner);
            _banner = new Banner;
            addChild(_banner);
            _banner.y = 1152;
            banTween = new Tween(_banner, "y", Back.easeOut, 1152, 155, .5, true);
            //Execute createNav AFTER this tween is done
            banTween.addEventListener(TweenEvent.MOTION_FINISH, createNav);
        //load XML for nav buttons
        private function xmlLoad() {
            xmlLoader.load(new URLRequest("data/navigation.xml"));
            xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
        //check to see if XML is loaded
        private function xmlLoaded(event:Event):void {
            trace(event.target.data);//show the raw XML
            xml = XML(event.target.data);
            xmlList = xml.children();
            trace(xmlList.length());//show the # of nodes
        //add the nav buttons on the stage
        public function createNav(e:TweenEvent) {
            //set nav start position and spacing here
            navX = 130;
            navY = 330;
            navSpace = 5;
            var _navButton:NavButton;
            //add nav buttons per XML data
            for (var i:int = 0; i < xmlList.length(); i++) {
                _navButton = new NavButton;
                _navButtons.push(_navButton);
                addChild(_navButton);
                //name each instance per XML data
                _navButton.name = xmlList[i];
                _navButton.x = navX;
                //Animate and fade in each instance of _navButton
                navTween = new Tween(_navButton, "y", Elastic.easeOut, 600, navY, 1, true);
                fadeIn = new Tween(_navButton, "alpha", None.easeNone, 0, 1, 1, true);
                //change text in each iteration of _navButton per XML data
                _navButton.navTitle.navText.text = xmlList[i];
                //add space between navs
                navX += _navButton.width + navSpace;
                trace(_navButton.name);
                //add event listener to each iteration
                _navButton.addEventListener(MouseEvent.CLICK, onClick1);
        private var _tweens:Array=[];
        //Set onClick function for each nav button added
        function onClick1(event:MouseEvent):void {
            for each (var navButton:NavButton in _navButtons) {
                navButton.removeEventListener(MouseEvent.CLICK, onClick1);//this isn't being removed, why?
                navButton.addEventListener(MouseEvent.CLICK, onClick2);
                banTween2 = new Tween(_banner, "y", Back.easeOut, 155, 300, 1, true);
                _tweens.push(new Tween(navButton, "y", Back.easeInOut, navY, 400, 1, true));
        //Suggestions are welcome here!
        function onClick2(event:MouseEvent):void {
            if (event.currentTarget.name == "Home") {
                trace("Home has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Home_mc" from library
            if (event.currentTarget.name =="Bio") {
                trace("Bio has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Bio_mc" from library
            if (event.currentTarget.name == "Flash") {
                trace("Flash has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Flash_mc" from library
            if (event.currentTarget.name == "Print") {
                trace("Print has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Print_mc" from library
            if (event.currentTarget.name == "Web") {
                trace("Web has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Web_mc" from library
            if (event.currentTarget.name == "Art") {
                trace("Art has been clicked");
                //insert code to keep this._navButton.balloon_mc visible in the "over" state
                //insert code to return all other _navButton.balloon_mc in their "up" states
                //insert code to remove other galleries
                //insert code to (re)insert "Art_mc" from library