17 Y seats are blocked for airport assignment on MD80s RDU-DFW (go check seat maps for 1537 or 1997 for next March). Rows 7, 8, 32 and A&B seats in row 31. If you are not signed in or are signed in but not elite then even more will will show up as unavailable.

The seat maps can easily look full when there are many more than 7 seats available for sale, and still not be oversold.