If you potted the the 12 dollar pot on the flop and got 2 callers, how is the pot only 36 on the turn? Shouldn't it be 48?

Is this a "the donkey thought I had A-A-x-x, called my flop bet with bottom two, turned his boat, I paid him off and am now frustrated because he left 5 hands later and I couldn't win my money back from him" post?