I did have to pay the price bump as if it was a new order, including AP, premium package and base price to get those new seats. They should be able to roll over your deposit into a "new" order. Everyone was caught off guard by this announcement and I was told by my OA that any changes made after my confirmation date would probably be honored without a fee.
Same here. My tesla page shows P100D, but also has a row with a blank field for the seats (with price of 2500). Hopefully its just a glitch and we both get the new seats! From a manufacturing standpoint, I think any P100DL with a premium package is getting those seats anyway? Not sure next gens would be any P100D build.