Fiona Hunter

Dear HMRC, I recieved a letter from HMRC stating that I had 18 NIC shortfalls (a mixture of Class 2 and Class 3). I paid the full amout to cover all the years in November 24, from abroad but in Stirling, and my app was updated today. Of the 18 years which I paid for, only 8 have been filled, and somewhat randomly. Has a mistake been made or will the other years be filled at a later date?