A person can belong to ONE location and ONE group only.
Change one person, click update. Move onto the next person. Clicking update will only make changes to that one person and will clear any other changes.
If you want the person to show on the site, check the box under Sort / Live column.
DO NOT use any symbols in the short name ($, %, &, etc.). Stuff will break.
Add a New Person
A user can only be added to one group and one location. Choose wisely.
Add a New Group
You can create as many groups as you'd like, but you may only put a person in one group unless you create multiple entries for that person.