Why its like this? Two months before that, I got about 2.5$ for every 10 clicks this is ridiculous :\
First of all, I think it is against AdSense TOS to publish information such as your eCPM. Secondly, I can't see to what you're referring - everything on there looks as intended to me.
Well, it is possible that the advertisers which attracts your visitors to click are the lower paying ads.
Because that is what your cut from the advertisers bid was - if you had more valuable traffic you would get a higher amount.
i am having hard time earning from Adsense this year... i think they are paying less... i am making double at bidvertiser... and in fact bidvertiser is paying more then adsense after christmas...