I think it has to do with keywords, not layout. Anyway good for you! There is nothing better for the AdSense Publisher than an AdWords lame
Congrats! Me too got $7.49 from 3 clicks just day before y'day but y'day i got $0.01 from 150+ clicks... I reported this google.. may be someone is tried to get me banned. Now things are back to normal. I am watching that particular site closely.