Why does this element appear to scroll when it has position fixed?

[Ditto]

I have been trying to figure this out for a while,I have a page with an element that has a position:fixed; It is positioned to top:0; and left:0; but when you scroll the page, it appears to scroll and dosent remain in the fixed position. If you use the "inspect element" feature on Safari or Chrome it highlights the element as if it is still in the fixed position. I had originally thought it may be something to do with the fact that the page uses ajax to load content from a database and then uses an infinite scroll to keep loading content as you scroll.You can view the page at: http://www.davidmcmenemy.com/bwg_shop/index.phpAny help would be great!Thank you,David