A month or so ago, while we were trying to determine the cause of the infinite loop in my job, I turned on "Extended debug logging" in the Log settings window.  I never got around to turning it off, but now we're trying to identify the cause of performance problems on that server, so I went to turn it off.  I unticked the checkbox, but noticed I'm still getting debug statements in the log file.  So, I tried restarting the VisualCron service.  Still getting debug logging.  Then I tried to disable *all* logging, by unchecking both boxes under "Log to file."  No change, I'm still getting debug logging.
What's up?  How do I turn off all of this logging?
I have build 5.7.8.
Thanks,
Rebeccah