When was the ticket bought? Anything different from the other tickets?
Absolutely nothing different. All reservations were made together (LAX-MEX-LAX) about three weeks in advance and paid by the same credit card. No cash, no one ways, no same day purchase. Nothing that is different about any of my travel patterns. Though most of my flying is to Asia, I frequently fly to MEX and other locations within Latin America. Just seems strange. You would expect an SSSS for an unknown traveler.