A Balance is showing in Payable Module, but there is Zero Balance in supplier account

I have a supplier account called Director FRO, which was created to pay the Family Responsibility Office the child support payment collected from employee during the month. This supplier account never has an outstanding balance because I only create an invoice at the end of the month when I'm ready to remit child support and mail a cheque.

When I have my payable module screen open and view the list of suppliers to the right, Sage indicates there is a $500 balance for my Director FRO supplier. When I open this supplier by selecting "Display Supplier Aged Detail Report", there a zero balance which is correct.

How do I fix the balance in the payable module to show zero?