[CS3] Glitch in flash? or in my scripting?

I have created a simple animation for colored bars to expand and retract on rollout, but while testing it out, I found the that bars would sometimes stick when they reached their max height.

Please let me know if you can see anything that can fix this problem
Thank you!!

Here is the swf: www.eventstyle.com/phase1_080519.swf

Here is the actionscript that I have written:


diver_mc.onRollOut = comp_mc.onRollOut = influ_mc.onRollOut = intim_mc.onRollOut = stim_mc.onRollOut = body_mc.onRollOut = chem_mc.onRollOut=space_mc.onRollOut=function () {
this.onEnterFrame = function() {
if (this._height<=365) {
this._height += 20;
if (this._height==371) {
this.onEnterFrame = function(){
if(this._height >= 11){
this._height -= 20;
if (this._height<= 11){
delete this.onEnterFrame;
}
}
}
}
};
};
}