For us, it has happened two ways. The first two times, we were the first people in those seats, so the flight attendants handled it on board by moving the other people. The first time, as we boarded, the gate agent took away our boarding passes and gave us different ones with different seats. We took our original seats on the plane anyway and were able to keep them by explaining what had happened to the flight attendants. The second time, they did the same thing, but we had printed two copies so we had extra proof.
Now I've started asking before we board, and when I am told our seats have been given away, I politely but firmly point out that I am the person who booked them first (being an obsessive/compulsive, I book them 24 hours in advance, and the other people who have them have always gotten them at the airport), so I should get them and they should move the other person. After all, it's their error...they assigned seats that should not have been available. They don't usually see it my way, so I call the ATA web help desk for back-up (their policy is that if I took those seats first, I am entitled to them).
The problems have never been due to an equipment change. Apparently, it's some kind of airport paperwork problem. Sadly, I "know" many of the people at the ATA help desk, as well as the people at MCO (usually there are different people at Midway). Web check-in is great when it works, but they shouldn't offer it if all the bugs aren't out yet.
We'll be doing it again this weekend, so I'll post a report on how it goes.
Barb
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