Coursepress: Instructors have access to course setup where they have not rights

Hey,

When giving someone Instructor rights on my site on one course, they also get access to see and edit the course setup of the other courses on my site. They do not have access to the course Items.

Why is this? I have been looking throught the Instructor rights settings, but cannot find an option for it there. I do not want teachers to be able to adjust stuff in courses where they should not have access.