I want to book a oneway flight from HNL to KOA on HA in first class. The HA website shows this is $164 on my date, but when the Amextravel website for Pay with Points has it at $260/26K MR. Is this something I can call AMEX about and have change it to 16.4K on their end? Is it worth trying Frequentmiler's "one time exception"?