You must have "Full Access" or "Limited Access - Website" permissions to update your league.
If Your Standings Aggregate at the League Level and You Have Division Page Types
If you have Division Pages in your League, all Team Pages underneath will display in the standings. All games from all divisions will count in the win/loss/tie standings, but only games played within the same division will count and display in the divisional record.
If Your Standings Aggregate at the Lowest Division Level
If all games for all divisions should affect standings, you would not need to adjust any further settings, as the lowest division standings level is set to do this.