TPageScroller doesn't seem to work

I've done a search on Deja news and there's not much mention of
TPageScroller. Does anybody use them successfully? I can't get the simplest
thing to work. If I have a page scroller (set to alTop) with a panel on it
with some buttons on that, it works alright initially. After increasing the
size of the form and then reducing the size of the form, the arrows start
appearing before they should. The panel seems get resized, but it's not set
to alClient. Any ideas?

Chris Bell