Re: Upside-down hive
They may or may not work their way back down. But at the moment they are set up pretty much like a comparable feral hive would be, and the next natural behavior on their calendar will be to swarm, as you have correctly surmised.
Originally Posted by bison
Me, I would put the top box at the bottom of the hive, leave the middle box in the middle, and the empty bottom box, on the top. They then have plenty of room overhead and feel there is work to do before they can swarm.
Course, this alone is not garuanteed to prevent swarming, but it's a giant step in the right direction.
If you are concerned about black combs in the honey supers, you may want to rearrange things comb by comb to try to get the white combs upstairs. But the basic configuration you should aim at is brood and as much stores as will fit bottom box, whatever else second box, and empty top box.
"Thinking Inside The Box"