[Craig]

This is certainly a bug that should be squashed, but my 2 cents is on how useful I have found it to have more explicit singleton category names. I too use folders as areas of responsibility (e.g., Teacher, Homeowner, etc.). I have named my singleton buckets "sing teacher," "sing homeowner," and so on. The advantage here is that when assigning projects, I can type the role and "sing" in either order and it goes to the right place:
singteach matches teacher>>SING TEACHer
teachsing matches TEACHer>>SING teacher
Not worrying about the order of those two facts (that it is a singleton, and to which area it belongs) when entering an action inches me closer to mind like water.