I really love how people seem to not read threads about this problem all over the internet and come up with the "cancel"-solution everytime, even if it is clearly mentioned in the OP that this doesn't work :o As far as i know, there is no way we know of now to make them go back to their original homes if you happend to send them to any of your settlements once, no console commands and i believe not a mod on the nexus yet, sadly. We are all stuck with this as another bad gamemechanic decision by beth :I