Have a SLC-JFK-PRG-AMS-DTW-SLC routing where the international Delta segments cleared OY in January. I now have the two domestic Delta segments showing up as being in OV class, which seems to indicate that they cleared after the 2/1 change, correct? But I cannot choose seats on these nor even move the seats on the international segments right now. The Delta agents I have been texting are busy and rather clueless about this, have tried three times so far and gotten helpful comments like "since this is a complimentary upgrade, the gate agents are the ones who will be assigning your seats during the flight". I am so tired of the time spent on crap like this during this employment meltdown. Any chance this flight coding stuff will resolve by itself?