So I go to check in tonight for my flight tomorrow from PIT-CLT-BHM. The site is VERY slow, but I am able to get in using the old East OLCI link.

But instead of taking me in, I am prompted with 2 identical flights on the "Choose a flight to check in" screen - the one I am on, and flight 631 from PIT-CLT on the same day.

Now I have seen where I change a reservation and the OLCI stills shows my "old" flight as being available for check-in, but this is different. Flight 631 doesn't even exist! And although I did change my itinerary, the outbound PIT-CLT flight was never modified.

I'm going to try checking in for my flight then see what happens if I try to check in for the phantom flight.