LOL, I did the same the other day. I had black ameraucanas and black olive eggers and banded the two ameraucanas. I was out of #4s and used 5s. The next day they were off. I couldn't find the bands that came off. Then two of my little buff orps died. I'm not sure if they ate them or what. Gotta order some more bands.
Sorry about your mix up.
Sorry about your mix up.