Solution : https://service.sap.com/sap/support/notes/208509 (SAP Service marketplace login required)
Key words : 
current spam/saint update, support package level reason, correct function module spda_patch_disassembler, support package level display, display support package level '0000', select 'goto -> inbox' select, saved ocs packages back, support package level displayed, support package directory displays, support package administration table
Related Notes : 
       
| 527271 | Incorrect Support Package level display after upgrade | 
| 207404 | CSC-ABPL: Asian Best Practice Library 5.0.0 | 
| 119738 | Problems during upgrade with Support Packages | 
| 117668 | Additional info: Upgrading to 4.5B | 
| 99300 | OCS info: Integrating LCPs into the upgrade |