I would venture to add my agreement with the superciedure equation. If their were going to swarm there would most likely be more cells, that there is only one queen cell usually means supercedure regardless of its location in the hive.
Any large hive is apt to have one or more laying workers. The further away from the actual queens location the more likely it is. If, from a cutout, you put brood comb or comb that was adjacent to brood comb in a different box from the queen and most of the brood the more likely for a laying worker to develop. A weak queen, getting into her dotterage, is also more likely for a laying worker to develop has her phernomes are less potent.
I wouldn't worry about it, a new young queen will cure this problem on her own once is beings laying. The laying worker may also have been initiated in order to produce sufficient drones for supercedure, especially if you removed most of the drone comb during the cutout process. The bees would still try to compensate for lack of breeding drones even if the delay in incubation of drone eggs is longer.