I think I see the problem with double clicks being recorded. In My WP setup my site was setup as http://buyyournichesite.com not http://www.buyyournichesite.com so my theory is that having the link point to “http://www.buyyournichesite.com…” was recorded, then forwarded to “http://buyyournichesite.com…” and the click was recorded twice.
One mystery solved.
Still, I’ve tried pasting http://www.buyyournichesite.com/sites-for-sale/?ap_id=mikee17 in several different browsers and it doesn’t record the click, it’s only when I click on a link. Does it work for you when you paste it in the URL bar?