Force Host (Built-In) ???
I just had to say lol @ this:

But then again, it stopped @ the: Waiting for 4 more players.
But still, why don't they start the timer @ "0" when there is +4 people in the lobby.
That just tells us: Hey, why don't you change max players needed? Your so genius arent you... there are 2 reasons why this happens.
1. Your NAT is open, which means you will be selected most easy to be host.
2. If the matchmaking can't put you in a game for some reason, it automaticly makes you host and searches for other players.
That's it GL HF