My wife and I flew MEX-YVR on JL11 a few days ago. We had been assigned row 9 but upon check-in had been moved to seats 1H, 1K without asking for them. I suppose they had information in the system that we were both AA-EXP (on a DONE4 issued by AA in NRT and reissued by AA at YVR).

Incidentally, on the flight down from YVR-MEX the week before we had been assigned seats in row 11 and had not been able, despite several attempts, to get the front cabin but upon requesting moving up at check-in we were moved to 1H,1K --but that was on the 2-class plane.