i booked an award reservation that included flights on UA, Asiana, Singapore, and Eva. On united.com when i view reservations and look at the other confirmation #s, only the asiana confirmation # showed up. I had to call in to get the conf for singapore/eva. the interesting thing that surprised me was that there was a single Confirmation# for singapore and eva. i took that # and went to singapore and eva websites and was able to select seats.