Hi, My MIL gave purchased those cake pop pans from TV and gave them to me. I just tried it and they didn't come close to coming out round. I made cake batter per the directions on the box and filled the batter all the way to the top of the bottom cake pop pan. They came out flat and some had little dome shape on the top...not even close to the circle its supposed to be. Any advice as to what went wrong? Thanks!