Originally Posted by
ijgordon
Hmm, AAdvantage award tickets are only ever booked with the operating carrier's prime flight number, no codeshares. So not really even sure why this reservation would have both, unless OP means it's an AA flight number in one direction and an JL flight number in the other direction.
I was wondering this too; the whole thing doesn't make any sense. But it doesn't matter, you just check in with the first operating carrier and ignore everything else