National Insurance Contribution Incorrect In Shortfall and Class in Dashboard!

Hello, I live abroad, and have done for 13 years (this was registered with NI), every year I get a letter indicating that I need to pay certain shortfall on my class two contributions. The letter I get contains the correct quantity that I need to pay. I want to now pay back that shortfall (I actually sent them the shortfall for year 2023), but when i log into my account - the shortfalls are I believe pulled from a different class and are significantly higher. I logged into my account last year and it was correct. Why is the letter i receive different from my dashboard account? How can i have it correctly in my dashboard?

Hi Sean A,
Personal Tax Accounts (PTA) will always show any shortfalls of voluntary National Insurance contributions at the class 3 rate.
If our International Team have sent you a letter to quote any shortfalls at the voluntary class 2 rate then please work off that letter. If you need a new letter then please write to:
HM Revenue & Customs
PT Operations North East England
BX9 1AN
United Kingdom
Thank you.