I"ve had my two hives for about 8 weeks now and so far, everything has been fine. I went into the hives this morning to have a look around. The bees have not moved into the upper box yet and I'm a little worried about them having too much space to defend. My other conern is this: I went out around 8 tonight and noticed a very large number of bees gathered at the entrance and the landing board of each hive. Are they too hot or is there something else going on?