It could be any number of things. On one occasion I booked a flight on ANA as a code-share via United and even with two record locators and the ticket # I could not for the life of me bring up the rez. Then, in the back of my mind, I recalled the agent on the phone saying my first and middle name as though they were one. Lo and behold, when I put in my rez # and my name with the first and middle name combined, that was the only way I could bring up the rez on ANA's site. Sounds stupid, but it might be that or because you booked via Expedia. Keep trying.