I have 2 hives which both have two deep brood boxes each. When I opened the hives last week to do Oxalic acid treatment I noticed that on one, the colony is concentrated in the lower box and in the other in the upper box. Is that significant either now or for later when the colony starts to increase? I'm guessing it is to do with where the stores are because the box I had to remove was light. I didn't disturb the hive with the bees on top.