Makenzie started doing this too. She takes her diaper off because she wants to go on the potty but she's already gone in her diaper. Just this morning I was downstairs putting laundry in the washer, and came upstairs to her pants & diaper off. It was a poop diaper and I couldn't find it. Thankfully she brought it to me...G.R.O.S.S. I'm so over this!