I hived three swarms between 6 and 8 weeks ago. One of them already filled almost all their hive with brood comb and started swarm cells so I split them last week. The other two have filled over half of the hives and are still expanding their broods nest. I have yet to see any full bars of honey comb in any of my hives. Most bars are about 2/3rds brood with a strip of honey at the top. Is this normal? Are my hives too small? I built them according to Les Crowder's plans (10" wide sides and bottom and 4' long). I'm worried that my other two colonies are going to fill up their hives and I'm going to have to make more splits. When should my bees quite expanding the broods nest and start storing honey?