I am using Dolibarr version 14.0.1. May I ask a doubt please regarding DOWN PAYMENT INVOICES in DOLIBARR ?
After we applied the DISCOUNT/ CREDIT from DOWN PAYMENT INVOICE to a STANDARD INVOICE, why does not the DOWN PAYMENT INVOICE show as PAID or DISCOUNT APPLIED in the list of Invoices ?
Because The DOWN PAYMENT INVOICE is still sitting in the LIST OF INVOICES as UNPAID or UNALLOCATED even after.
The problem is that you have create a down payment but you did not register the payment received for this down payment (See section payments of the down payment).
You must record the amount and on which bank you received the money of the down payment by recording a payment. By definition, amount of payment must patch amount of the down payment invoice.