People in a user group can give 1 "+" or "-" rep you have to click the users profile and it will show their rep click rate and then a window will pop up select either negative or positive and click confirm they have now received their rep from you.
Wrong. It has to do with the way permissions inherit. It seems some groups have privileges others dont. For example I can see upgraded users SF but not give rep. I can also see the staff sf (No password so cant see inside, just the forum).