How do you remove players from custom team? (PS4)

[SmoolyD]

I made a custom team and added players just to test the team out. I am now trying to remove those players from the team so I can add created players I've made. In "Manage Rosters" when I press L1, as it shows is the button to use to remove a player, a notification pops up stating that highlighted player has been removed, however the player is still on the team. Now I can't add more players because it says there's no room for more players. Please help.