To clarify---I have already booked the flight---last night, so still,within the 24-hour change/cancellation period. It is Flightn520 on March 8. I did not check the seat map before booking. When it came to seat selection, the map showed all seats Xed out, and the message about "airport control" appeared. The two other non-stop flights that day have only a few middle seats left.

What is odd is then before I booked, it said "only 3 seats left at $xxx" and it still says that after I booked two of those seats.