Hi Helen,
This question of mine might be out of turn here but hoping you can point me in some direction of light. I had a post in a lot of forums about statistics getting scrambled after changing a user role. I am not so worried about the stats but I am more worried about how moodle handles user roles. A person having more than one role or a person moved from one role to another causes issues in the logs being collated. Below is a link to that thread.
http://moodle.org/mod/forum/discuss.php?d=73882#p331476
Thanks in advance for the help.
Best Regards
Uday