My child plays on two teams in separate leagues. How can I see the teams and stats of only one league at a time?
You can use League Manager to categorize games,teams and players in any way you like.
By using leagues to group the games, you can see stats for any subset of games. Putting a team in only one league will mean that the team is displayed only when that specific league is checked.
To see more details about league usage, see this Forum Topic