Thanks -- that will help people get this running.
I also noticed the whacky dates and the new photos thing. That's a little disconcerting but not a deal-breaker.
Another thing that I had trouble with in my earlier attempts with this was that I had a "hidden" (just visible to me) category I called "Purgatory" where I moved photos that didn't really fit in (I moved them to "Purgatory" rather than delete them outright in case of future disputes, as I do in Threads). Unfortunately that category showed up on the Threads index with this mod. I simply deleted that category for now so it wouldn't show up.
I'm not sure if this was just because of something I did or what (I did try different Photopost settings), but maybe somebody else will be able to verify this without me having to setup another "secret" photo board.