What's wrong with this picture?

All of Elizabeth's 9 month old PJ's were dirty, and I didn't have enough laundry to make a full load, so I pulled out her 12 month size pajamas. She wears one that is sized 6-12 months, so I figured why not!? All was fine and dandy during the night, but when she was playing this morning, I looked down at her and found this...

Both of Elizabeth's legs were in one of the pajama legs... I couldn't believe that she could still crawl, but she managed to go all the way across the living room to her new cooking pot and grab some broccoli. Silly girl!