I've the user tracking mod installed and I've been doing some heavy PPC advertising. At the end of the day, when I look at the number of people in the user tracking that come in, from say Google, I can count 20 - 25. But then when I pull a Google Adwords report, its showing 100+. I have a feeling that its click fraud related, but why don't all of the clicks show up in the user tracking???

Thanks