Help!!! # year old pooping and peeing

   First off I didn't know whether to post this under behavior or normal!! My son will do great sometimes but mostly seems to not care if he pees and/or poops in his underwear!! I'm washing pissy sheets and pissy/poopy clothes almost everyday!! We did the reward thing..didn't work, did the dancing and singing thing...didn't work, did the target (cherrios) floating in toilet ..didn't work. We have talk with him(repeativly),done the timeouts,has had him clean up after hisself. Like this morning..he peed in the tiolet after getting up, but less then thirty minutes later I find him playing with his toys in a pair of underwear full of poop and wet with pee!!! Sitting there playing!!!
  Am I doing something wrong?..Is there something wrong with him? Or is this normal? I don't like to lose my cool but AAARRRHHHH!!!