> Sounds like all around bad decisions. The previous owner shouldn't have sold it as a 90 or at least disclosed that, "It's a 60 but Tesla swapped out the batter with a 90 and left it configured as a 90".

To be fair, for people not intimately familiar with the craziness of modern tech business, it's reasonable to assume that whatever capabilities the car has at the moment of purchase, are going to be there indefinitely. On the face of it, cutting car battery remotely via software patch sounds about as reasonable as remotely removing a room from a house you purchased.