Animation jumping to the side

[font=verdana, arial, helvetica][size=2]I am trying to make a flash movie to use for navigation on a site. Whenever you roll over the buttons, an animation is supposed to play. But for some reason the words always jump to the side when the animation plays. I’m pretty sure I have everything centered correctly. Does anyone know why the words are jumping? Here’s the fla.[/size][/font]