I am comfused now...
You book your a/f but wait until you fly for seats?
I thought you had to pick the seats when you paid?
I still think SW is the way to go...FREE BAGS. That is like 50.00 in my pocket (per person)
How many bags does each person check? Most airlines charge $15/pp for the first checked bag - so that's $30 roundtrip/pp.
) good luck
, couldn't find decent airfare from PIT to MCO initiating on same date as OP either
vs more than double to MCO via connecting flights. 
, never latched onto a great DING tho
nearly every time ive booked it...i won't even mention the different flight time changes (one more than 8 hrs
).
, good luck
consider urself lucky, although ive seen many other post same experience with AT as to multiple flight changes