Originally Posted by The Saint

This, I think, is why it is particularly useful. What you are seeing here, I believe, is the original e-ticket which has not been (properly) revalidated by BA. The correct info is shown in the reservation, but the info has not been updated in the e-ticket. This is, I think, what frequently prevents OLCI.

Originally Posted by xxxxx

What you people are seeing is what's known as a mismatched e-ticket. There are two parts to every booking, the PNR which is a record of the space held. Your e-ticket is essentially your authority to travel, when a BA ticket is changed with no additional collection or refund required then a revalidation of the eticket will match up the PNR nad the e-ticket. If a refund or additional payment is required (miles or money) then the booking has to be queued to the e-ticket department who will debit any additional money (Servicing debit miles if needed) and subsequently reissue the e-ticket to match the PNR.