Any 2 buttons work, any 3 don't?

Question

Hi everyone,
I'm finding some unintended results from buttons on my site, and there seems not to be a logic that I can just fix. The site is arcotecture.info if you wouldn't mind taking a look. On pages such as "(r)Evolve" and "undo," there is a vertical sequence of thumbnail buttons on the right that trigger a sliding image viewer to see them larger. Once the viewer is open, it should be possible to click on any of the other thumbnails and go right to the large image without moving the viewer at all. But for some reason, any two combinations work, and any 3 don't. Try viewing a 3rd once the viewer is open, and the slider closes, even though the script would never have told it to do that. The only way to make it close should be the minus sign button (called reverseButton). Also, if you click the same thumbnail again, sometimes (only sometimes?) the slider closes, which is wrong and not in the script.
The script for once the "(r)Evolve" viewer is open looks like this: (and the thumbnail buttons are named revolve1Button to revolve5Button from top to bottom):
stop();
function reverserevolve5 (event:MouseEvent):void
     gotoAndPlay(1221);
reverseButton.addEventListener(MouseEvent.CLICK, reverserevolve5);
function gotorevolve2fromrevolve5 (event:MouseEvent):void
     gotoAndPlay(923);
revolve2Button.addEventListener(MouseEvent.CLICK, gotorevolve2fromrevolve5);
function gotorevolve3fromrevolve5 (event:MouseEvent):void
     gotoAndPlay(1022);
revolve3Button.addEventListener(MouseEvent.CLICK, gotorevolve3fromrevolve5);
function gotorevolve4fromrevolve5 (event:MouseEvent):void
     gotoAndPlay(1121);
revolve4Button.addEventListener(MouseEvent.CLICK, gotorevolve4fromrevolve5);
function gotorevolve1fromrevolve5 (event:MouseEvent):void
     gotoAndPlay(824);
revolve5Button.addEventListener(MouseEvent.CLICK, gotorevolve1fromrevolve5);
function GoToOptionsfromrevolve5(event:MouseEvent):void
    gotoAndPlay(2);
optionsButton.addEventListener(MouseEvent.CLICK, GoToOptionsfromrevolve5);
Is this just too much script and too many frames? It seems easy enough to execute, but I'm new to this. Anyone know what might be causing this unpredictable behavior? Thanks a lot,
Jono

Answer 1

While this may not address each condition of an error, one thing you said may be fixable by using gotoAndStop() rather than gotoAndPlay() in those event handler functions.  If you are stopped at a particular frame and execute a command to gotoAndPlay that same frame, the stop that might have kept it there is already used up, so it plays.
I wish I could understand more about what controls the sliding out bit.  That's something that should be trackable as to what tells it to retract when it isn't supposed to.  If it is a timeline tween that makes it appear and go away, then something is probably telling it to play() when it shouldn't.