Happens all the time. I think it's just the data is not fully propagated.
humblebeginnings
4:13 pm on Oct 7, 2005 (gmt 0)
It's Google's latest product: clicks without impressions. It's in the same product range as - preview tool without previews; - traffic estimator without estimates; - smart pricing without smart. You're one of the lucky folks invited to test it. Cheers!