I have a TBH in Denver, I am staring my second year. The bees have been very successful here. I started them last April and by June they filled the entire hive with comb. The hive was very full with bees this spring, and for the last several weeks with many bees were bearding even through cold nights. They finally swarmed Monday and it was a HUGE swarm. I have harvested the last bar of capped honey twice this year (they keep attaching to the back board) and now I am noting mixed brood comb farther toward the back, where it used to be just honey. Are they starting to get honey bound? Could that be why they had such a huge swarm? I have heard never to change the position of the bars, but I have also heard to move the bars next to the brood comb to the back to prevent them from becoming honey bound.