I started sorting the last JHP and the first three entries went into various miscellania. This is mostly a fluke of the volume, I think. I would expect the great majority of History of Philosophy papers to fall under some listed name, and most history papers are on a single figure.  Still, we should worry about getting the high level categories right so that secondary figures aren't scattered to the winds.  It would be nice to sort all the occasionalists together, regardless of nationality.  Likewise, it would be nice to get all the Cartesians together and all the unlisted philosophers in ethics and politics.  Once history starts to fill up, you really don't want to put everyone who isn't German, British, or French into 17/18th c. Misc.
Along those lines, Rousseau is listed under French philosophy when he really is Swiss.

On preview I find A's with circumflexes scattered through the message.  I'd delete them, but maybe it counts as a bug.