Hello,

If you are interested in abilities:

1. How to forbid the moderator to invite and add players in a team
2. How to forbid the moderator to add it is more than 3-4 players in a team
3. How to make that the moderator could add a team in tournament only after there will be 3-4 players

please submit a request for custom development.
Offering you custom services as it is immediate way to receive the function.) Also I have registered an improvements so once we plan the new releases we might choose to develop these functions. Not promise much but this is the best way how I can help you at this stage…

4. Why the player appears in a team before has confirmed the invitation by mail

It's a bug it will be fixed in the next version of JoomSport component.

Let me know if there are any questions, I'll be glad to help you.