When I upload users into my course, specifying name, username, password, city and course name, the user ends up in both of my courses. The second course was created from a backup of the first course.
This is occuring on more than one of my Moodle sites w/different databases. This is causing all kinds of headaches for the users. They end up clicking on a course that they are not to be in.
I don't know if this is a bug, but it continues to happen. I have version 1.5.2 running on Red Hat Enterprise system.