How do I change or add a team admin?

This is done through the Member List page for your team.

1. Navigate to your team page

2. Click on the "Member List" link (its on the right hand side).  You can only access this list for teams of which you are a member.

3. You should now get a list of club members (including their real names and membership status).  You can promote other players to have "admin" rights over the team; and demote existing "admins" to normal player status.