I just check my adsense account for my sudoku website, it shows $14 eCPM buy only $0.01 for 2 clicks How can this happen?
Most probably like this: You have had 1 page impression which resulted in 2 clicks on the ad. You have earned $0.014 from them 2 clicks. $0.014 x 1000 impressions = $14 eCPM. Lets just hope you don't keep having a 200% CTR when you get more impressions than 1. Although I'm not 100% sure if this is what happened, but this is what it looks like to me without all the stats.
are there MFA sites on your site? block them on competitive ad filter, it will increase your earnings.