You are an active coach, you have also been invited as a player on another team and registered, then became an assistant coach on still another team.
Now you want to be able to switch between these teams while still staying logged into a single account. Simply click on the fast switcher icon in the bottom of your locker.
This will bring up a dialog that lists all the teams you belong to and the role you play in brackets.
If you are the parent of a player, their team will be shown along with the childs first name, helpful for families with more than one child.
This switching can also be done from any page with the switch button at the top right.
Clicking this button will bring up the same dialog.