do you know if your swarms had virgin or maybe really young queens? i got one earlier that had a virgin. it took her a long time to get going well, but now she's super. i hate to requeen a swam if i don't have to. especially if i know it has come from a long existing feral hive.
mine was probably the 3rd swarm out of that tree according to the lady who called me. as i understand it, after-swarms often fly with a virgin or very new queen.