said deloptes via tde-users:
First, thanks very much for doing the research on this. You were better at figuring out the question than I was. After some fiddling I've gotten it so that a message read one place is read everywhere.
The "ghost" messages, though, remain. Deleting the .index files doesn't seem to have solved the problem.
I'll keep poking at it.
In other news and in case anyone here has done this and has advice to offer, I just took a bit of a plunge, to wit, signing up for Starlink. Frontier Communications, until recently the worst company in the world, was bought by Verizon, the new worst company in the world. Same bad service but now costing one-third more. Turns out that Starlink is cheaper than Verizon and has more bandwidth. Hoping I won't have to cut down too many trees. Apparently I can also do VoIP and keep my current number. It will be a happy day when I can send notice to Verizon, something involving the horse they rode in on . . .