I can't see the object names in your events but it looks like you have the ScrollBack sprite pinned to the MenuWindow. When you click the button you move the MenuWindow to 120,120 but things pinned to it won't have their position updated until after the whole event sheet runs. You're setting the scrollbar to ScrollBack.X before ScrollBack moves.
[quote:1y3ve1e6] Initial animation is set to "None" and the only animation in the animation list is "Press".
If you don't have an animation called "None" then it's going to play the first animation that you do have. If you don't want the animation to play you can set it's speed to 0 in the animation properties or you can stop the animation on start of layout.