Unfortunately, it probably does mean that Fleso. Still, you'll note that an assigned seat and a blocked seat are two different things. Make sure you use that count when you are seeing if all the seats are taken. There is always a legend next to the seat map which shows available seats, assigned seats and another option which will say either airport blocked seats or tier level seats. The last category may or may not be taken but you certainly can't get them online, which most people take to mean that they are full. Not always so.