Re: Strange BP/WPMU Problem
Your first issue is by design. The Site (Super if you’re on WP 3.0) Admin > Users option only appears when you activate Network mode (or are running WPMU). It shows everyone with an account on your installation. The Users > Users panel only shows accounts that have a user role on your blog (Subscriber, Contributor, etc). That list won’t show accounts that signed up through BP and thus don’t have any role on your main blog.
Not sure about the second issue. You have a screenshot?