Interesting comment regarding LA flight credit posting. I made a roundtrip to SCL using my AA FF number in the booking. both computer generated boarding passes displayed my AAdvantage # and emerald 1world status (I always check for this, figuring it is a confirmation that my FF number was entered correctly).

First flight posted in 3 days, second flight never posted. AA wouldn't research the problem until the publicly advertised 2 month period for posting had lapsed-- so I had to stick my ticket and bp in a file and flag it for a date 8 weeks hence.