Following what happened to the colonys, observations, behaviour, inspecting every 2/3 days.
Old Queens present throughout
I've seen three cells one with my old girl which I posted on that thread and another 2 year old had three cells.
The old girl was eventually moved to a nuc and is being replaced.
Both had virgins and old queen's in the same hives.
If I saw more say 4 I would be wondering but then it would be a case of observing what the colony was doing space, stores, laying ability, cell type as superseded cells are selected