Autosize iframe not refreshing to top of page.

[Sprogg]

Hello,
I have a very annoying problem with which i would be grateful of any advice.
I have installed an autosize iframe on my page and everything works fine until i add extra content below my navigation menu.
After adding the extra content ( red image) the page will not refresh to the top when a link is clicked.

A Demo can be found at:
http://homepage.ntlworld.com/sprogg

Thanks in advance for any help offered.