Yes that happens quite frequently because you get paid on CPM (per thousand impressions). I never see more than a cent though. Anyway, if I were you I would blank out out the CTR, I don't think you are allowed to show that, even though it shows 0%.
from last 4 days, i am getting $$ for impressions daily, i think now google give $$ for every ad impressions now on CPM bases.
I agree with this...people always say block our your CTR, but how the heck would Google find out who' account it is? Do you think they come in here and monitor screenshots?