Unfortunately we discovered a small bug in 1.3, the Database ownership module default warning level was not showing a yellow advisory condition when using the Inspector default warning level (NULL), we have now updated Git with the latest revision.
If you would rather not re install 1.3 again you can workaround the issue by running the following code if you are running with the Inspector default warning level.
UPDATE [Inspector].[ModuleWarningLevel] SET WarningLevel = 2 WHERE Module = 'DatabaseOwnershipCheck' AND WarningLevel IS NULL;