Exactly so: find the reason for the swarm. I just had a hive swarm thrice after a split, and found them to be honeybound during the blackberry nectar flow. This was negligence and lack of experience on my first-year-beekeeping part but would have been preventable. Find the reason they swarmed. By the way, I caught two of those swarms and hived them. I think the bees do what they need to do when beekeepers don't do what they need to do.Uhhh., go capture them & they won’t move? More importantly, you don’t want them to move into your neighbors structure, or yours for that matter Once a hive swarms there are multiple Q cells left behind (you probably didn’t see some). Swarming could have something to do with the genetics, but I would first examine my management before I blamed the breed.