I checked in right at the 24 hr mark. Since I booked through southwest, I had to check in with them at the 24 hr mark, but since the flight was operated by Airtran I wasn't given a boarding order. I was given a boarding pass, but it had a dash in the seat assignment spot. I also couldn't do airline checkin at my Disney resort (art of animation), so I had to drag my bags with me to the airport and wait on line to check them. I tried to get my seat assigned at this desk, but she said to go to the gate for seat assignment. When I got to the gate (1.5 hrs before my flight), I was told there wasn't a seat for me. I was given the denied boarding brochure and asked if I wanted a check or flights, I chose the check and signed a paper stating this. After waiting 15 minutes he came back and said they couldn't issue me a check siince I booked with points. He gave me a number to call to book the free flights. I knew this to be untrue since I had an issue in the beginning of March(with the same flight) and started a thread where more knowledgeable people chimed in about flyer rights and denied boarding procedures.
Here's the link to that thread if anyone is interested.
http://disboards.com/showthread.php?t=3073804
I think the confusion here is that I booked through southwest, but the flight was operated by airtran, so neither procedure seems to be in effect.