NOTE: If you need to add a team from a different hierarchy to a team, you must do that from within the competition, not the team.
From Competitions, click Manage Competitions.
Click the name of your competition.
From the Teams tab, click Add Teams.
From the Add Teams box, tick the box that says "Search for a team outside my hierarchy".
This brings up a search area. Enter the name of the team. The Competitive Levels are optional. Click Search.
Tick the team name. Click Add Teams.
NOTE: teams added from a different hierarchy will appear in the list without a link.