It sounds like to me, its refreshing loads and loads everytime you click something. A way of testing this would be to load a webpage with a timer on it (not sure where) and see if it moves up as it refreshes.
(Sounds quite good for Ebay
Its a weird problem, and I'd have no idea of how to fix it, though it seems like its doing that.
I guess you are using Internet Explorer though? Its not a fix, more a turn around for you. Download Firefox which is better than Internet Explorer. Many people are switching, and is becoming popular now.
It is safer, more secure from spyware, and can be faster too. It offers advanced features, and...wait for it...wait for it...it allows you to import all your saved pages and history from Internet Explorer. Find it here:
You will never turn back, honestly
Hope this helps...or enlightens you...one of the two