score:8
You can try to ask the TSA to check into it:
Follow @AskTSA on Twitter and direct message the following:
Full name
Known Traveler Number (KTN)
Airline
Confirmation Number
A member of our team will contact you and help you figure out why you’re not receiving TSA Pre✓®. It's important that you're enrolled in TSA Pre✓®, Global Entry, Nexus or Sentry.
If you’re not a Twitter user, or would rather speak to somebody on the phone, you can reach out to our TSA Contact Center [866-289-9673].
I haven't always had success with this (they've claimed the name needs to be adjusted when it's the same name that always works), but they should check on it and get back to you.