I have 5 hives total (all doubles) 2 of them seem a little odd to me. They started off brood development in the bottom as a single. After I added the second box several weeks ago, both were utilized. But as of lately, the bottom deeps have activity but no production or storage. Just nice clean, drawn out frames. The top deeps weigh alot with honey and all brood production up top as well. Thoughts?