Solution : https://service.sap.com/sap/support/notes/650997 (SAP Service marketplace login required)
Key words : 
receive double update, terms va02 reason, attached coding corrections, sales order created, sales order, funds management, program errorprerequisites, solution implement, release 462 patch 0006, patch 0007
Related Notes : 
       
| 669928 | FM irrelevant PO line item updates FM | 
| 651782 | Continuation of note 624007 (RFSYS) | 
| 624007 | Incorrect FM udpate of sales order billing plan |