Im just starting my second season as a beek and am noticing what seems like a strange separation in one of my hives. I put a second deep on a few months ago and the bees have been working it pretty well. They initially started with some brood up top but the last couple of inspections I saw that they seemed to be slowing down on brood production in the top deep. This last inspection I see almost a perfect separation of brood and honey on the bottom and the top. The top is almost completely full of honey while the bottom deep is almost completely full of brood. I haven't fed them in months. Otherwise the hive is very active and seems healthy. I waited until they were about 7 1/2 frames full on the bottom before I added the second. Why so little brood in the top and what should I do, if anything?