It seems very strange , everyday i get a few more clicks than the total clicks in my sites , i have put the sites on which i have adsense in the channels list , when i add the clicks from them , they are less than the total clicks i get , what do i do?
1000 impressions count as a click as far as I know. But I would make a channel for each site, then contact Google and let them know that you are ONLY associated with the sites you've created channels for.
Just like you get "phantom" clicks, advertisers get "phantom" charges that are for CPM impressions, not sure if they do exactly 1,000 or what. That's another reason they don't want you to excessively refresh your own pages. They are very miniscule though so barely count.
The problem may come from the channel set-up. It's seems like sometime custom channels don't work properly in recording clicks and impressions. I would recommend you (if it's not already the case) to set up URL channels rather than custom channel. It solved the problem in my case.
I also use www.asrep.com and it shows me a detailed information. Don't forget people viewing the cached version of your page may also click on it.