Solution : https://service.sap.com/sap/support/notes/1611677 (SAP Service marketplace login required)
Key words : 
transaction usage records / stad data, single aplication server, solution kindly implement, showing incomplete entries, multiple application servers, complete data, transaction logs, incomplete logs, report grac_action_usage_sync, terms grac_action_usage_sync
Related Notes : 
       
| 1607067 | Master Note for SAP Access Control 10.0 - Support Pack 6 |