Joining team ladders
To join a ladder that involves teams, such as the 2 v 2 ladder, you can either join it by yourself or join as a team.
[edit] Joining with a Team
If you wish to join with your friends, you must create a team proposal involving each player you want to team up with. Once all players accept the proposal, they become a team and are placed on the ladder. Players can only be in one team at a time.
Any member of the team can change the number of simultaneous games by clicking "Change Settings" or dissolve the team by clicking "Leave Ladder."
[edit] Joining by Yourself
If you join by yourself, you will be matched up with different players and teammates every game.
[edit] Matching
If you join by yourself, most of the time, you will only be matched against other players who also joined by themselves. Players who join as a team will usually be matched against an opposing team that joined as a team. However, there can be exceptions if no other match is possible.