With the information given, I would agree that is appears they are trying to supercede the queen.. for whatever reason. She could be old and fizzing out, or perhaps was damaged in the move.
Cutting out the queen cells is dangerous, as you could end up queenless if she is physically damaged or near the end of her laying capabilities. If faced with this my approach would be as follows.
Get a nuc ready and go back into the colony, take your time and find the queen. Move her out and into the nuc, with a few frames including stores and capped brood along with accompanying young bees. Leave all the queen cells in the old colony and let them proceed with making their new queen.
If they actually were planning to swarm, then it is less likely they will proceed since you have removed the old queen, simulating a swarm. Either way, let them make their new queen. Once you see the new queen has mated and is laying eggs, you can dispose of the old queen in the nuc and combine the bees and frames back with the original colony. If something should go wrong in the replacement process, you always have the old queen in the nuc to fall back on.
To everything there is a season....