posted payment register and posted invoice register balances ?

Hi,

Our posted payment register and posted invoice register credit total and debit total are not equal.

Is this normal

Eg.

Posted payment register - Credit total =12000 , debit total =2000

is this okay

I am confused on how to reconcile the parables activity to satisfy the below equation. Whether i need to take credit total or debit total ?

January AP Trial balance + February Invoice Register - February Payment Register = February AP Trial Balance

thank you,

Katy