C258 deleting job list

Hello!
I have a Konica Minolta c258. For security reasons I want to delete the Log and Comm. List that appears in Job List. I entered Utility->Administrator Settings->Security settings-> Job Log Settings and i erased all logs but it hasn't affected what's displayed in Job List.
Also as a secondary question in Job List->Log i can see only 100 entries, is that all the printer saves?

Thank you!