Solution : https://service.sap.com/sap/support/notes/550480 (SAP Service marketplace login required)
Key words : 
symptom bop processes orders taking, bop mads differ, oltp change history, incorrect mad reason, source code corrections, /sapapo/bop, account results, symtom occurs, terms transactions, /sapapo/vs01bop
Related Notes : 
       
| 375193 | Backorder processing: Composite SAP note on posting |