Bug in google adsense? Probably not worth exploiting

Hi all
I put in a tower google ad block on an existing website from a new google adsense account where I already have four google ad blocks per page with code from another google adsense account.
This seems to me as if I now have double the allowed ads meaning double the amount of chances to make money but it seems to be breaking the rules. I imagine that the url channels are now being duplicated so maybe I won’t make anything. Or maybe google will penalize me. What do you think? Thanks