Solution : https://service.sap.com/sap/support/notes/376465 (SAP Service marketplace login required)
Key words :
additional key words faz, sales order item number, milestone billing plan, sales order items, incorrect assignments occur, attached program correction, attached advance correction, sales order, payment requests, final invoice
Related Notes :
| 364710 | Incorrect down payment clearing by FI documents |
| 329276 | Incor. down payment clearing for partly cleared down payment |
| 113347 | Down payment process. as of Release 4.0x (standard) |