[edit: you know... now that i look at it... it looks like the frames are offset and wrap to the right side of the screen. You can see the ball start off on the right side and wrap to the left side....

I'm getting the same thing with your animation.. I'll try making my own and see if it's just that one.. Well.. I ran into the 'smaller animation not getting recognized' problem.. I uploaded Loren's animation, then cleared it, then uploaded a shorter one (like 5 frames or so).. reboot and it doesn't think it has an animation..