I understand it that X player teams stands for X players in every team. That means that the number of players has to be a multiple of that number. For a 3 player team, 6 players on a balanced maps are needed. The play then 3vs3. It is a kind of continuation of the 1vs1 mode (where a "team" consists of only one player).
I think the names could be clarified to "teams of X", then it would be clear.
I understand it that X player teams stands for X players in every team. That means that the number of players has to be a multiple of that number. For a 3 player team, 6 players on a balanced maps are needed. The play then 3vs3. It is a kind of continuation of the 1vs1 mode (where a "team" consists of only one player).
I think the names could be clarified to "teams of X", then it would be clear.