i think that happens because popularity contest is a counter. so it has to be everywhere where people a clicking.
you need to understand what a "hit" is: a hit is nothing more then a HTTP GET-Request. Let's say your page consist of 10 files (images, css, scripts) and you get 1 visitor, he will generate 10 hits.. basicly.. cause that happens only if he really downloads the whole site.
if he clicks by mistake, hits abort for some reason or using the back-button, he wont finish the download of the full document.
BUT: he will at least receive some files.
And because css, counterscripts and such are placed on top of any page (head), those are being loaded most. More then the normal content and thus generating the most/more hits.
i hope i explained it understandable... its still early for me (plus, i'm german and my english is sometimes.... ^^)
however.. only check for the visitors/computers.
hits are just the files downloaded.