jeez ... yeah I said I clicked "Change Flight" ... mnnp posted that redoing check-in resends TSA info; I cancelled out of the "Change Flight" function without actually rebooking, and the system generated a new BP (first time still w/o Pre, but got it on the second try a couple hours later)
bad on me for not explicitly saying that I was trying to force a new check-in, not actually trying to SDC; would have avoided this entire back-and-forth
once more, with feeling: it's NOT NECESSARY to comment on EVERYTHING
and now back to our regularly scheduled discussion of LAX T2/T3