My seat on JFK-LAS is D1, LAS-JFK is F; on the APP the D1 seats are blue, the F seas are black (which I thought were non-selectable). In any case on
www.delta.com for anything related to seating I’m directed to co9ntact DL Vacations.
I wil call DL Vacations (their hold times are shorter than the DL DM line.]
Ah, ok. The post was a bit confusing.
As it's Saturday (I know this was a bit early on Friday) it's likely a result of schedule change being loaded. They could be getting rid of flight, changing equipment, or moving time. The seat map gets locked a lot of times. I would wait till Sunday or Monday.
Are you sure nothing has changed for this flight? Flight number? Etc? It may be telling to contact DLV due to needing ticket reissued.