You are missing the fact that the same ad could be reported in two different channels.
For example you could have a 300x250 above the fold ad channel to track the performance of that ad. It could also be counted in a URL channel you have set up. As the same revenue would be counted in two different channels it would lead to the kind of discrepancy you're reporting between your daily totals and the sum of the revenue from your channels.
Msg#: 3407180 posted 10:53 am on Jul 30, 2007 (gmt 0)
It cost me more in billable time to read this thread than you have listed in total earnings but that's not important now... ;)
There are lots of reasons your AdSense channels don't add up and you probably overlooked something.
I always make a list of my domains as channels and if the DOMAINS don't add up to the AdSense totals, then someone might have your adsense code on another server and you need to alert AdSense ASAP that fraud might be happening.
I had the same problem with one channel. I e-mailed google adsense and they admitted they had a problem. I lost quite alot of money during the week this happened. I didn't get a refund for the lost revenue.