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0 impressions in one channel but i see clicks from that channel.
Yup, i belive, they use different databases for channels, clicks and also different database for daily/monthly stats.
Thats why , we see occasional discrepencies in the stats.
I belive, this is high time for google to start reporting stats once a day.
Even with end-of-day numbers, I'm seeing a decrease in Page Impressions (Ad Impressions seem fairly normal though). And not just a small amount... a 30% decrease in page impressions recently, while other numbers remain fairly consistent (aside from percentages based on PI, of course).