Originally Posted by
Dr. HFH
Interesting, and good to know. I never heard of the concept of a confirmed seat divorced from the relevant ticket.
When you first create a reservation and get the 24-hour hold (may even be longer for an RTW), you have a confirmed seat but not a ticket! When IRROPs occur, if you are rebooked but there is a routing change, the ticket will not match the reservation until someone re-issues the ticket.