Not sure how you enrolled in Pre Check, but it's basically more important that your name on your frequent flyer account match TSA's records. (What is listed in your passport or driver license is not as relevant, because TSA compares your name on your boarding pass to their own database.) Initially after I enrolled through Global Entry, I was never given access to Pre Check. It was only after asking the TSA staff at the Dulles Airport help center that they pointed out to me that my Sky Miles account listed my name as first name, middle initial, last name and that TSA spelled out first, middle and last name in their database. Thus, after I had Delta change my name to spell out my middle name, I have received Pre Check on the boarding pass ever since at check-in.