You cannot use more than the 3rd role on a single player.
When you go into a game. None of your players will have more than role + or role ++. After the 3rd role you will not be able to use the 4th or 5th etc in game. Been a bug since the beta.
Forum Discussion
This seems to be really hard to fix. I am Sure it has nothing to do with not generating microtransactions and only with being reeeeeeally hard to do. Still not fixed by patch 1.20
