Find out if most of the clicks are from one source. If you have Google Analytics go to Content > Adsense > Adsense Referrers Select todays date, then click the Adsense Ads Clicked column heading to get the referrer with the greatest number of clicks. If the referrer is a pay-per-click company you are being click bombed. You can block referrers using htaccess. See [webmasterworld.com...]
Check also on Adsense Pages in the left menu. Click on the tab on top of the leftmost column marked "Secondary Dimension" and select Domains to see if the clicks are coming from one domain.
Msg#: 4459092 posted 9:01 pm on May 29, 2012 (gmt 0)
I wouldn't, since Google has already removed them there's no need to raise the alarm. But I would worry about what caused the clicks. If if was large number of clicks compared to the usual daily total, you might want to keep a close eye on your traffic sources over the next few days.
Msg#: 4459092 posted 2:05 am on May 30, 2012 (gmt 0)
I don't think Google always updates every metric at the same time. I mean, I don't know that for sure, but it seems like they don't in my account at least. As long as you end up normal, I wouldn't worry about it.