Solution : https://service.sap.com/sap/support/notes/385989 (SAP Service marketplace login required)
Key words : 
additional key words tvak-lisof, create delivery immediatelytvak-delcf, affected sales document type, double requirement remains stored, system automatically generates, calculation rulevbap-fixmg, fix quantity indicator, sales order item, commitment dates switch, sales order
Related Notes : 
       
| 392292 | Double requirement for rush order | 
| 117705 | Commitment date:Incorrect confirmatns f. dely grp |