Brought some villagers into a box underground, had to move them to a different spot as they were interrupting my area. Destroyed a workstation (composter), brought it over to the new spot and placed it down. Then, two villagers of the same profession were in the underground box even though there was one workstation. Same thing happened with a fletcher, destroyed the fletching table, brought it over to a better place and then there were two fletchers. This is the first time this has happened to me. I destroyed the fletching table again and all of a sudden there were three fletchers.