Originally Posted by
LupineChemist
My issue with these in the past was that it's specifically an AA coded IB flight issue where there is sort of an ad-hoc system just for those reservations that doesn't actually create an Amadeus reservation.
LOL. Apologies to the OP but this is even worse than I thought! All to save a few bucks or earn some extra miles by booking a codeshare.
Confirms my informal policy of "never a codeshare unless absolutely necessary".