When you join my game the map should be checkerboarded. That is good.
Once in back out go to split screen and don't change ANY settings
Then start the game
You should be kicked. This is fine
Message me with the words "done"
I'll invite you back.
Once your back i'll change the map and start the game.
Pick and a class and you should be spectating me.
You will see a flash of colors
and then it wll say "Now Infecting"
When the text is no longer their.
You just back out.
Start up a privet match and invite your friends and have fun!