Mortgage balance query

[Pinkpanter]

I have a 25 year mortgage taken out in 2004- 174k-4.4% over 25 years.
Balance Jan 2016 was 117,405.
I paid 12,000 off as a lump sum keeping the term the same.
Balance September 100,464.
Mortgage paid Sept/oct/Nov/Dec
I paid 14,000 off the balance in October keeping the term the same i.e. Reducing payment.

Balance 31/12 is 86,376
Is there something wrong- I assumed the balance would be. Circa 85000? Any ideas. I have logged a query with my mortgage provider.

 

[elcato]

At first glance It appears that there should be two interest payments in the four months, September and December so they would pretty much cancel out two mortgage payments. Unfortunately you took the balance before the interest was due in Sept. and after it was paid in Dec. I'm guessing.

 

[Pinkpanter]

Interest is paid every quarter on the 15 th of month- march- June- sept - dec.
So 4 months mortgage and 2 quarters of interest.