Brendhan. What a bummer!!!! YOu spent so much time to give these little ladies a new home and look what they did!!! Guess we will never understand the beehaviour of these little critters.
If I were you I would head back to the compost bin and catch them again. But this time give them a piece of your mind and let them know that they would be in a much better place.
In all seriousness, I do wonder if they jsut headed back home too. Go check it out!! Off to the bee meeting. Great day. Cindi