Hello everyone!

I added a new channel to my existing AdSense (for my 2nd site) and placed the channel ads on that site while I changed nothing on the site that I originally signed up with AdSense for. However, since then (4 days ago), the 2nd site shows good impressions and click and all that, while my first site's impressions went way down, so did the clicks. I am confused, here's the question: Since I added the channel ads on the 2nd site, should I create channel ads for the one that is expreriencing decrease in impress/click and replace the old ones? Any suggestions?
Thanks!

I would create a channel for each site. That way you can see exactly what is going on so you don't have to guess.

yeah create a channel..
it keeps track which ads/layout is optimzed for your site..

Create a channel for each site (I would put a channel for each adblock, you want to know CTR) because it doesn'ts ound like you have a channel for the first site up despite guessing the impressions went down.