Solution : https://service.sap.com/sap/support/notes/679831 (SAP Service marketplace login required)
Key words : 
0b            import support package 18, 1c            import support package 12, symptom incorrect results, 0b support package 18, 1 content support package 12, hierarchy node variable, bw support packages, support package, 0b patch 18, 1c patch 12
Related Notes : 
       
| 703266 | Hierarchy node variable (modifiable by nav) is ignored | 
| 647747 | SAPBWNews BW 3.0B Support Package 18 | 
| 601038 | SAPBWNews BW 3.1 Content Support Package 12 |