When I had my initial problems getting the "new postings" to work because of all the old topics that had regained their new designation, I thought you said that that had been fixed. My "marking all topics as read" was supposedly going to clear that from any old ones and I assumed that it wouldn't happen any more.
Well, today there were a whole bunch of posts in the Luciaphil and Robin categories that had rejoined the "new" ranks.