I've had this problem too. Also the problem of booking a flight and then wanting to see it to be sure its right on line. If they haven't faxed it to you, it seems not quite fully updated in the system.
Maybe they are just selling tons of tickets given the stupidity going on at other airlines with bag fees?
It is a problem that should be looked into. When a ticket is sold, why isn't the WHOLE record written into the database? I have had errors where it says my name does not match with what they have on file for that PNR. It is like part of the record is there but not all of it.