Custom Scoll Bar Tutrorial Questions

I recently went through the custom scroll bars tutorial here on kirupa and am having some problems with the up arrow. it seems that when pressing the up arrow it doesn’t go to the top of the movie clip but cuts off about an inch off the top. i’ve uploaded the file which will display the difficulties i’ve been having. if anyone could help me out with this issue that would be great.

http://www.g-studios.com/upshift/main_964.swf
http://www.g-studios.com/upshift/main_964.fla