I had the same experience. Bought my car from an out of town dealer. When I first went to my local dealer for service, the car was removed from My Porsche a few days later. Called PCNA and they told me this was for security reasons. They put the car right back in for me and also helped me activate my Porsche Connect services. But this seems like a pretty aggressive action to take for simply switching dealers. They could send you an email to confirm it was legit rather than deleting the car.