Swarm control - failure of new queens?

[Taliesin]

One of my hives took off and expanded quickly in April, to the extent I had to split to prevent swarming. It was on double brood and bursting with bees, so I made up some nucs with uncapped swarm cells. All nucs made up with 1 frame brood, 1 frame food and bees from 4 shaken frames.

Three weeks later, things are not quite as I expected:
Nuc 1: is doing fine - has a new queen.
Nuc 2: Original QCs hatched, but no new queen seen...but has 2 capped queen cells (definitely not there 3 weeks ago)
Nuc 3: Original QCs hatched but no new queen seen. A few scattered larvae and several supercedure cells on the frames.

Is this failure of the new queens?
Thanks for your advice.

 

[enrico]

If they were brood frames in April then you must have had a queen in all hives at some point to have queen cells now!
E

 

[Taliesin]

Thanks. All brood has hatched - nothing left except the few scanty new larvae and the new QCs (middle of frame in one hive (supercedure); and classic swarm cells on bottom of frames in the other).