Sorry for your loss and that is a great example when they are most valuable. A week out and I would bet the farm it would have been a very different story regarding availability.
I wonder if this intentional, by design or just stupidity. I would think the non-obsessive FF would check once or twice in advance then just give up and even let expire. So maybe its by design.
The real question is how many to create from WN points before the AirTran trick goes away Nov 1.