Originally Posted by
lightbulbs
You can also remove your aadvantage number from one of the reservations which would make it hard for the system to detect the overlapping bookings.
This is incorrect and has been for 5+ years. AA agressively matches "impossible" tickets and cancels one or both, sometimes without notice.
When the change is for a work-related reason, simply have the changes made and pay the fees necessary, presumably paid for or reimbursed by the employer.