Solution : https://service.sap.com/sap/support/notes/793963 (SAP Service marketplace login required)
Key words : 
sapbwnews bw support package 11 netweaver'04 stack 11, lower-level nodes behave correctly, 10 content            import support package 20, 0b            import support package 26, lower-level characteristic selection, 50            import support package 11, 1 content support package 20, additional side effect, higher-level node, 0b support package 26
Related Notes : 
       
| 763338 | SAPBWNews BW Support Package 11 NW'04 stack 11 RIN | 
| 723262 | SAPBWNews BW 3.1 SP Content 20 | 
| 723257 | SAPBWNews BW 3.0B Support Package 26 |