There is possibility of another role having same Tcodes, whichever you resticricted.
So Go to SUIM--> Roles by Complex Selcetion Criteria-->enter USERNAME In selction according to user assignments tab -->Enter Tcode whichever you blocked in selction by assigned application in Menu -->Exexute-->
This will show roles which are having access of Tcodes, whichever you blocked.
From corresspondance role you can remove Tcode.