I have vented inner covers on all my hives and had something very strange happen last night. I opened the top of one of my hives, a double deep w/ a shallow super set up for cut comb. It had 1 inch thin surplus starter strips. The colony had a good population but had not moved up in to the super and started drawing out comb. There was a single bee in the vented cover that tried to hide under a mouse guard that I store up there. I knew right away she was a mated queen. Big fat one. She was all by herself. As I tried to pick her up she darted to the center hole and disappeared back in the hive. Never seen this before. All I can think of is she was hiding from a second queen. If I'm right they will have to figure all this out
Pretty cool man! Good luck with the outcome.
...JP