That is as NORMAL as it gets actually. During the flow they are inclined to build up. This also means building comb, and brood. Most of the time if the hive is new as they are, in the first season where they have to build their combs you may not see full combs of honey until late in the fall. As for your hives it would help to see a pic to know for sure if they are on the small side or not.