I am happy to report both flights to and from London to Dallas cleated the waitlist. Flight 78 Friday night last week cleared 3 days before and I took 79 home today and that cleared yesterday. Twitter was unable to reissue the ticket so I had to call the EXP line. No big deal.
I know there’s a certain someone on here who is going to say “see??!!” :-)
Anyway my only bad takeaway is that I chose 7A on the 772 today. Won’t do that again.