This is my first winter with two hives. It was over 50 degrees, which in Utah is pretty warm for January, and the bees were flying, so I opened the hives to check how they were doing. There were far more bees than I expected to see. The cluster in both hives were at the top of the two deep brood boxes. I lifted the hives and they feel quite heavy, I would guess approximately 60 lbs. I guess the most surprising part was that the clusters were at the top of the top brood boxes. I left a partially filled medium super on each hive to ensure that there would be enough honey for the bees to overwinter. Is there anything in this scenario that should concern me?