Is it true that if you increase the number of Adblocks you payment per click decreases??? I'm asking this because i recently made some changes on my blog (http://offprint.blogspot.com/). I only had one adblock, now i have 1 leaderboar, 1 link block unit and 1 adsense for search and my payment per click decreased a lot (i used to get around .35$ per click and today about .10$
I added an adblock and the per click tripled. So, I'd say it's not the amount of adblocks it's the ad-type running.
Yeah, you need to locate the "main-adblock", and make sure it is placed correctly. I bet it is possible to screw things up by adding more blocks... good luck!