A sales order ($34,900) was entered and invoiced to the customer.  When payment arrived, it was entered as a deposit (it should have been recorded as a payment against the open receivable).  Latger the sales order was reopened to add freight ($2000) and the original product quantity already billed was zero'ed out.  The sales order was invoiced to the customer for the freight.
 
When the freight payment was received, it was recorded as a payment against the second invoice number.  DBA posted the $2000 payment and also applied the deposit.  
 
The deposit is gone, the A/R subtotal is zero and the Sales and Cash accounts have the correct balances, but the A/R Transaction Listing shows the application of the deposit as an "overpayment".  Is there a problem?  Why does it consider this an overpayment?