"Reswarming", is that a word? But anyway, I have a friend who has placed two swarms, at different times, in brood boxes , set up with foundation etc only to have the bees leave in the next couple of days. I asked a local beekeeper who's been working with bees for almost 50 years what he did to keep a swarm from "swarming" again. He said as soon as he got the bees in a brood box at home, he'd slide a queen excluder between the bottom board and the bottom brood box and leave it for a few weeks. He said he'd never lost a swarm he had captured in almost 50 years of keeping bees when he used a queen excluder in that manner. I thought that was simple enough and something I hadn't thought about myself. I shared that info with my friend and he was glad to get some new idea on what to do. He has 20 active hives now and has offered to let me work with him to show me how he catches swarms. Now if my work schedule will allow me to be there when the bees do their thing, this should be very helpful and interesting.