I am attempting to implement a set of permissions and issue security schemes to only allow "External Users" to see tickets. When I log in as an external user, I can only open the ticket with the "external user" security level. However, I am able to search and add any column I want and that information is displayed to this user. I am certain these other issues have a different security level of "employees only". What's the point of the issue security scheme if it shows everything anyways, or am I missing a permission I should restrict?