Button Movie Clips Loops Ad Nauseum

Question

Greetings
I have a button that is a movie clip that is set up with animations triggered with MOUSE_OVER and MOUSE_OUT event listeners.  The glitch is that once the mouse is over the button ... each ensuing pixel that the mouse is moved, loops the animation again.  That probably didn't make a whole lot of sense, so I posted the file on my test site (http://www.savagepixels.com/test/test.html).  You have to drag your mouse slowly across the button to see this. The bottom part of the button works as I'd expect.  When you roll over the text at the bottom of the button, everything functions as it should.  The looping problem starts when you roll over the image portion of the button.  For some reason it considers each consecutive pixel rolled over to be a new event and consequently triggers the "over" animation again.
The code I have is below.  I've commented out the MOUSE_OUT function for now.  There is also a screenshot at the above link of my Layers palette for the button clip in question.  I put a "stop" label at each frame that has an action so you see the actions used.
Thanks for helping!
oneBedButton_mc.buttonMode = true;
oneBedButton_mc.addEventListener(MouseEvent.MOUSE_OVER, overEffect);
//oneBedButton_mc.addEventListener(MouseEvent.MOUSE_OUT, outEffect);
function overEffect (e:MouseEvent)
    oneBedButton_mc.gotoAndPlay("over");
function outEffect (e:MouseEvent)
    oneBedButton_mc.gotoAndPlay("out");

Answer 1

That was helpful. I had one of images in the button movie clip that wasn't a movie-clip type symbol ... it was just a static .png image.  Once I converted that into a movie clip, the repetitious looing went away.
There is still some weirdness if you refresh that same link ... (http://www.savagepixels.com/test/test.html) if you roll over the lower part of the button where the text "One Bedroom + Study" is, and then move your mouse up over the image portion, the whole MOUSE_OVER event gets triggered again.  This is weird because there are no actions whatsover in the button movie clip except a few stop(); keyframes.  It treats the image as a separate button.  Any ideas on what is causing that event to be triggered in this way?