Reports are not working

In the report there is a lot of result for some that are NOT in the course:
Please go to: http://screencast.com/t/23nSVN4Tu
http://kurs.xpand.no/wp-admin/admin.php?page=reports&page_num=1&course_id=285
Vies report: ID: 3 Martin Morfjord 5 0%
In the PDF there are many result from other course what is that?

And just to you see this: at &course_id=285