Hi bobcf220346
The current supplier balance is made of the transactions recorded for the supplier and the opening balance, if you already know which transaction this $9600 amount is from, deleting/reversing the transaction then re-record it correctly if needed would be the way to go.
However, the supplier balance is the amount yet to be paid while the bank statement shows payments already made, they are used in different reconciliations. The supplier balance is used in Payable reconciliations, while the bank statement is used in bank reconciliation. I would suggest following these Help articles to check both reconciliations in your company file respectively:
Reconciling your bank accounts
Receivables, payables or inventory out of balance
If you have any further questions please feel free to let us know.