GotoAndStop is sometimey

Question

I have a movie that uses a next and previous button.  The next button works the same on every page calling a function that uses next().  The movie continues until it is told to stop.  The previous button takes you directly to a specific frame in the movie.  When running through and testing, if I go forward a frame and then back to the beginning,  and then add a frame every time, it seems to work fine.  But if I go forward 3 times and back 2, or mix it up in any way, the previous button will only work once.  Then after that you can go forward as much as you want, but you can only go back once.
Here is my code below
Each frame that has a previous button has a unique function.
Thanks in advance for any help.
Anthony
stop();
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
stage.addEventListener(KeyboardEvent.KEY_DOWN, Next);
Next_btn.addEventListener(MouseEvent.CLICK, Next);
Previous_btn.addEventListener(MouseEvent.CLICK, Disclosure2);
function Disclosure2 (event)
    gotoAndStop("Disclosure2");
    stage.removeEventListener(KeyboardEvent.KEY_DOWN, Next);
    Next_btn.removeEventListener(MouseEvent.CLICK, Next);
    Previous_btn.removeEventListener(MouseEvent.CLICK, Previous);

Answer 1

Well I implemented all the changes.  And I still get the inconsistent performance.  Is this a bug?  Or am I just missing something?
My code now looks as follows:
stop();
stage.removeEventListener(KeyboardEvent.KEY_DOWN, Next);
Next_btn.removeEventListener(MouseEvent.CLICK, Next);
Previous_btn.removeEventListener(MouseEvent.CLICK, Previous);
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
stage.addEventListener(KeyboardEvent.KEY_DOWN, Next);
Next_btn.addEventListener(MouseEvent.CLICK, Next);
Previous_btn.addEventListener(MouseEvent.CLICK, Disclosure2);
function Disclosure2 (e:MouseEvent):void
    stage.removeEventListener(KeyboardEvent.KEY_DOWN, Next);
     Next_btn.removeEventListener(MouseEvent.CLICK, Next);
    Previous_btn.removeEventListener(MouseEvent.CLICK, Previous);
    this.gotoAndStop("Beginning");