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Re above questions/comments: I've been trading almost every day for 40 years; mostly futures. I rarely trade less than 100 sides per day; sometimes 1,000 plus. There was no statement to mis-read; my TE was $100k lower, from "Account," which I keep open, on one of my 12 LCD screens; several for IB; most of Sierra Charts. I did check in "Trades," if someone an execution had a really bad price, but not the case.
I'd guess some programmer made an error in updating something. There should be code that prevents that. But since I was told immediately after speaking to customer support that it was a "known issue," IB could have sent me an e-mail immediately. There are other times, when for less impt items, they e-mail.