Hi rgennaro, I would like to add a few questions.
>So last week I moved some frames from the brood box into a honey super separated by a queen excluder.
What did you replace the space left behind in the brood area with? Drawn comb, frames of foundation, foundationless, other? Apparently it helped because at the end of your post you report "The rest of the hive is doing well. The new queen got going and there is lots of new brood."
That is a good thing!
>The frames looked full of honey ...did not see any brood in them they were from the hive that was getting honeybound
It is not unusual to find a few frames which are (almost) all honey, having a 'small' area of brood in hives without queen excluders this time of year. Is all or nearly all this drone brood capped?
>The new queen got going and there is lots of new brood.
Is the new brood in the bottom mostly worker brood of different stages, eggs, larva and capped brood?
>The frames looked full of honey
As you say the frames looked full of honey. If they were full of honey they would not have room for the drone brood unless the bees moved the honey down making special room for this brood in the top, which is unlikely. Since the queen is down below the excluder she could not lay these unfertilized drone eggs. As you probably already know, hatching eggs are fed jelly for the larva to feed on. When first hatched and very small, it can look shiny in the bottom of the cells. Is it possible that you mistook the area where the brood is located as un-capped shiny nectar at that time?
>While I understand that I might have missed a few eggs/larvae when I moved the frames, what I don't understand is why they were all drone ones.
Being the brood area was getting honey bound as you described, the queen would lay unfertilized drone eggs in preparation for near future swarm mode. I have noticed before swarming you will find drone brood. With the frames being crowded, she might have used the little available space in the honeycomb for this purpose just before you moved the frames up. You might have warded a swarm off as you added space in the brood area by moving honey bound brood comb up as you also stated, "the queen has went back to laying". I would again check the brood area for queen cells. Also you will need to remove the QE as the hatching drones will not be able to pass through the QE and will be trapped above unless you have an additional top entrance. As these drones hatch, the bees will fill this space with honey, (as long as you have a flow going on), since you now have plenty of room in your brood area for the queen to take care of business.