It always seems to me that if there's one swarm there's two or three. And they seem to be chaos. I think the bees get very confused and don't know which swarm is there's. Were all your swarms close together in time? Were they pretty well established in the hives or is it possible they got together shortly after you hived them? Maybe they were still confused and thinking in swarming terms and ended up all in the same hive from all the Nasonov phermone?
Wax moths don't kill a hive. They just destroy all the wax in a weak or dead hive.
Wax moths don't kill a hive. They just destroy all the wax in a weak or dead hive.