That is correct. Lee should be a ordinary member. And only EP-admin is the one and only admin. My confusion is because I thought according to Conrads screenshot on the other thread, he had a similar issue of user Br1an or something out of place and in the admin group as well.
I checked wp_sfmembers and the admin column exists and is all zeroes for every user except for the correct admin. His has 1 instead of 0.
As far as your sorting question I'm not sure how to answer, but I'll try. I haven't been using my custom theme lately (no time really), this occurs on the Default theme. So however it's called (haven't even looked at it), is how it's called. Unless there's a option in the backend for sorting, I haven't messed with anything. I'm viewing the member list by clicking the Members button up near the Profile and Log Out buttons.
I hope that helps?
Edit: Forgot to mention I svn upped to 6791 before testing and posting this. It still behaves the same.