Can't Reduce Logging Level

Support had me turn logging up all the way to help troubleshoot.  When we were done collecting logs, I set the global logging level to zero and set all the other logs to the global level.  Regardless, the disk in the server filled up with logs in five days.  I've tried restarting NetBackup services and rebooting the server.  It's still logging away like Paul Bunyan.  How do you get it back to level zero?  NetBackup 7.5 on Windows 2003.  Thanks.