it does that in the timeline preview, did you try a browser preview?
I tried both timeline preview and browser preview. The trigger has sym.stop(); in it and it keeps on going. :-/
I figured it out. I was originally thinking 'flash' timelines and tried to add a gotoandplay to a symbol using a specific point (time) in the timeline. When I created a label on the timeline and used gotandplay to the label name it worked fine!