Yikes. The details only appeared here for less than eight hours on a Sunday.

Perhaps the OP or someone else here (maybe a FT "official" such as a forum moderator) could contact the blogs that are reporting this and ask them to remove details.

BTW, twice I experienced some variation of this in reverse. Once the TATL flight seemed to arrive early into either ATL E or ATL F and the immigration lanes were wide open with no staff in sight, so some people just walked through. Another time (also ATL) it was a preclearance flight from DUB and we deboarded in a way that forced us to walk through immigration, although after this was pointed out, the immigration employees just asked people where they were coming from and waived us through without having to show any documents. That time, I don't remember going through customs (again) or TSA airport security before my connecting flight, although we were mixed with passengers arriving from other overseas destinations without preclearance.

Mistakes happen even though they shouldn't.