Originally Posted by
baliktad
In short, select your seats for your AS-operated flights on alaskaair.com. The seats assigned to you there will prevail. Anything shown on aa.com is out of date, doesn't matter, and won't be updated. This applies to nearly all tickets where the marketing carrier is different than the operating carrier.
indeed, in fact sometimes the non operating carrier even shows you in seats that dont even exist on the operating carrier