Everytime I go to play a vanguard or any other co OP mission, I end up the only one in the fire team when I know you can't play vanguard until 2 other people are found before you're allowed to actually play. I've never expected that but it's making me not want to play because I never get a fireteam and I don't know why it's happening when it's not allowed to happen. Please help me and others that may be having the same issue.