REMOVED_FROM_STAGE event firing when it shouldn't...

Question

Hello everyone,
Wondering if someone has seen this before. I have an application that has a few navigation points on the main timeline. The document class stops the movie at the first frame, and the "home" movieclip's class has Event.ADDED_TO_STAGE and Event.REMOVED_FROM_STAGE listeners on it. Funny thing is, it is calling the ADDED function as normal, then firing the REMOVED function immediately after. However, when I run it, it doesn't actually remove the movieclip from the stage. It is still there. When I navigate to a different section ("remote" or "assist") and navigate back to "home", it doesn't fire a second time, everything works properly after the first time.
So I guess my question is, what would fire the REMOVED_FROM_STAGE event without actually removing the object from the stage? And why would it only happen once?
Thanks for looking!
-Nick
Here is some code as well as a screen shot of my main timeline:
package src.modules {
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import src.utils.greensock.TweenLite;
    import src.utils.greensock.easing.*;
    public class ModHome extends MovieClip {
        private static const DISTANCE:int = 700;
        private static const TWEEN_DURATION:Number = 1.0;
        private var _currentPage:int = 1;
        private var _isDone:Boolean = true;
        public function ModHome() {
            super();
//            trace("home initialized");
            addEventListener(Event.ADDED_TO_STAGE, onAddedToStage, false, 0, true);
        private function onAddedToStage(evt:Event):void {
            trace("home added to stage");
            removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
            addEventListener(Event.REMOVED_FROM_STAGE, onRemovedFromStage, false, 0, true);
            // BUTTONS
            pageLeft_btn.addEventListener(MouseEvent.CLICK, onMouseClick, false, 0, true);
            pageRight_btn.addEventListener(MouseEvent.CLICK, onMouseClick, false, 0, true);
        private function onRemovedFromStage(evt:Event):void {
            removeEventListener(Event.REMOVED_FROM_STAGE, onRemovedFromStage);
            // BUTTONS
            pageLeft_btn.removeEventListener(MouseEvent.CLICK, onMouseClick);
            pageRight_btn.removeEventListener(MouseEvent.CLICK, onMouseClick);
//            trace("home removed from stage");
        private function onMouseClick(evt:MouseEvent):void {
            if(_isDone) {
                switch (evt.target.name) {
                    case "pageLeft_btn" :
                        movePages("left");
                        break;
                    case "pageRight_btn" :
                        movePages("right");
                        break;
                    default :
//                        trace("home -- nothing");
                        break;
        // SCROLLING WINDOW
        private function movePages(thedirection:String):void {
            _isDone = false;
            var x1:int;
            switch (thedirection) {
                case "right" :
                    if (_currentPage > 1) {
                        _currentPage = _currentPage - 1;
                        x1 = pages_mc.x + DISTANCE;
                        TweenLite.to(pages_mc, TWEEN_DURATION, {x:x1, ease:Quint.easeInOut, onComplete:onTweenComplete});
                    } else {
                        _isDone = true;
                    break;
                case "left" :
                    if (_currentPage < 3) {
                        _currentPage = _currentPage + 1;
                        x1 = pages_mc.x - DISTANCE;
                        TweenLite.to(pages_mc, TWEEN_DURATION, {x:x1, ease:Quint.easeInOut, onComplete:onTweenComplete});
                    } else {
                        _isDone = true;
                    break;                   
        private function onTweenComplete():void {
            _isDone = true;
            pageMarker_mc.gotoAndStop(_currentPage);
//            trace("complete");

Answer 1

No reason in particular, when I created the class, FlashBuilder put it in there (I'm using Flash Pro CS5 + Flash Builder 4). I read that it calls it by default when the class is constructed, so having it in or out didn't really matter. I did comment it out with no luck, but I ended up shifting around the timeline quite a bit today and the problem has gone away. It seemed to only do it when it was in the first frame.
Thanks for your help, I'm going to investigate it further when I have time just for reference, I'll post anything I find here.
-Nick