My son (NW Silver) and I (CO Gold) just bought tickets from NW on a single reservation for flgiths on NW. Our recent experience with CO is that this messes up EUA such that neither one of us gets upgraded even though plenty of seats in first were available. A CO gate agent had to divide the record so that EUA would work. Should I divide the record to avoid this kind of a problem, or is NW programmed differently so that it won't be necessary? Can anyone address this from personal experience in the same situation?