My wife has paid voluntary contributions Class 3 to top-up and fill out gaps that she has in her NIC records.
She has paid an amount equivalent to 6 years for the following years that she has gaps on: 2020 to 2021 (1st year), 2012 to 2013 (2nd), 2011 to 2012 (3rd), 2010 to 2011 (4th), 2009 to 2010 (5th) and 2008 to 2009 (6th).
However, funny enough, in her records it shows only the 1st year (2020 to 2021) that the payment has been allocated. And, the other 5 years are still showing "Year is not full", i.e. the total payment covering those 6 years have not been fully allocated yet.
So, how come in her records, only 1 year has been allocated and the remaining 5 years have not yet?