Do you have a good nector flo? and, do you have a super on.
You may want to take a look see in the bottom box and see first hand what is going on.
If they are storing honey without any pollon, and there is no brood "what so ever" in the bottom,
Then I would switch boxes.
If there is any young brood in the bottom, leave as is.
If there is mostly capped brood in the bottom and young brood and eggs with queen in top, Then I'd switch. "here's" why.
When the brood that is in the bottom hatches, the bees will start storing their winter stores in the top,
If that is not what they are doing already.
You do not want a swarm this late.
I have always read that in the fall to try to have the cluster on bottom and the top one or two boxes of stores on top.
Again, It some times depends on where you are and how late your last major flo is.
Here in Central Ga. I would not do this until after the first of Sept.
Others may have better suggestions.
I do what works for me.
doak