I left this post on the linkshare board but I have found that board to be not as active as this board so I hope it's OK to ask this question here?

I am affiliated with some merchants at Linkshare. I had been getting sales almost every day or every other day. Last week I noticed on my webalizer stat report what looked like a url to a linkshare affiliate. When I clicked on it I got a blank page, It had a different pid than mine. It kept showing up, for awhile. Ever since then I have not had one sale with linkshare. Is it possible that this other linkshare affiliate is a parasite and is stealing my commissions. I really don't know how this works so I look forward to your answers??? And if that is the case, is there something I can do about it??