Team stacking and switching teams

[Ripper McGee]

Well 1v1 if cnt b 2v1 were would we join?

"not allowing a player to join a team when there's already 1-player extra on the team"

If there's a 1v1 match, then there's not already 1 player extra on any team. As such, you could join either team. If, however, there was a 2v1 match, you could only join the team with 1 player in order to balance the teams.