Why are there bills that have been paid on my Aged Payables list?

Sometimes this question arises from a misunderstanding about the nature of the Aged Payables list which shows unpaid at a particular date whether or not they were paid after. For example if your Aged Payables list dated 31st March shows a bill paid in April, the list is correct.

There are however two reasons that might cause an error in the Aged Payables. Theses include:

The bill payment has not been allocated to the bill
A duplicate bill has been added

If an error is spotted, check the list if bills for duplicates and check the payment has been allocated to the bill.