Due to both the second part, and that of the 7 accounts that we know this happened to, they messaged us just hours after tweeting that we weren't picking up their tweets, it doesn't sound like a match. The logged-in account also had no history with the accounts in question; we were actively in a call at the same time trying to figure out why that person could see tweets the others couldn't. I'd be happy to discuss details and specific tweets if you want.
