Re: For the Michael Palmer cell builders, crazy scenario!
Same thing happened to me this year. The frame with the queen was the first to go into the nuc box which was sitting beside the parent hive at the time. After I finished pulling the rest of the frames, the nuc was moved across the apiary, about 30'. Imagine my surprise when I opened the nuc a week later to find queen cells and my queen back in the parent hive.
I think she walked back while they were next to each other based on ages of larvae in the nuc.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.