D&D and diapers

We left my 13 month old with my mom while we went to our weekly D&D games. When I dropped her off I told my mom that DD needed a size 3 diaper for bedtime because she wets through size 2. So we go and have a great time rolling dice and eating pizza. When we pick up DD, I notice that the size 3 was still in the bag. Oh, well I'll just change her asap in the morning. Well, I went to change her today, and found not a size 2 diaper, but a swim diaper that I had left in the bag. 😆😆 I guess I need to be more specific next time.