80
brash:
Here's a screenshot of the Registered Users group settings...
I don't see anything wrong there.
I'm not sure about the session variables but I do know that if I don't use a custom session, users have to log-in twice before accessing anything, hence the custom session.
FYI, I do not get logged-out of the site.
Edit: I changed the custom session to 24 hours (86400 secs.) and also (I don't know if this is an issue), I don't use caching on any of the modules.