Is your DS PB? It sure sounds like it. He was never able to give us a production time table. In fact he was never able to tell us exactly when it went into production. I spoke to him on the 24th to get answers and thats when he said my car was already in production, when I asked what stage he said he didn't know. When I asked for estimated delivery.....he didn't know. Then he was gone for a week and when he returned didn't answer my email. Low and behold yesterday he reached out to say my car was already on its way to Dania. I asked about the updated third row seats and he says mine was already built with it. Which in a way was confusing because they emailed mentioned cars built before March 26th. I wouldn't be surprised if you car is on the truck with mine. What specs did you choose? I'd wager to say your car is probably on its way too, if its similar in specs since it seems they were batching. Do you know what factory yours was coming from?
Unresponsive DS was my biggest frustration as well.
As for the 3rd row seats, you might want to check your VIN against the recall coverage on TESLA website.
VIN Recall Search | Tesla Service