Flew earlier this week on UA metal with a US codeshare flight number. The flight was booked as a government Y fare (YCA) and the fare basis "Y" appeared on 'My Reservations' on line and on the e-receipt.

The miles posted and the fare basis appeared as "E" so I didin't get the Y fare EQM bonus. However, My Reservations and e-reciept still showed the Y fare basis.

I called and ultimately got routed to the Web C/S folks in India. The first rep I spoke to stated that since it was a US codeshare the fare basis on US was Y but the UA basis was E. I pushed back that government contract flights booked in YCA were Y on all carriers regardless of codeshares and that my reciept showed Y (true for every one of dozens of my previous codeshare YCA flights). It escallated to a supervisor and the supe quickly agreed that it they saw it as a Y fare and I should wait a few days for it to clear up. He stated that he'd make a note in the record.

Sometime in the last 8 hours my e-receipt and My Reservations changed and the flights earlier this week now show an E fare basis (not cool!). The return flights still show as Y.

Anyone have an idea about what happened here and what I can do?