Flagging this on the NZ board as I know that a number of AP members are members of both UA and NZ FFP and credit to one account or the other depending on which gives the better mileage credits. Have flagged this 4 months ago to both NZ and UA and neither carrier seems to care to allow U, E, O, A inventories, so book one of the cheaper NZ economy fares (only a few actually provide credit) if you want MileagePlus credit.