Try "Middle Seat on Delta - Any Ideas?"
C'mon, it would have been worth the trouble to explain the situation in the thread title.
See below. At check-in, there were no seats open? Was your CO FF number in the system?
Can SkyMiles® Medallions and SkyTeam® Elite members select Coach Choice Seats?
Yes. Medallions and SkyTeam Elite members and companions traveling on the same reservation may select Coach Choice Seats free of charge within 24 hours of departure during Online Check-in or at an airport self-service kiosk. Medallions and SkyTeam Elite members also have access to Preferred seats.