That actually is mentioned during the Navigating the Maze section, but I will clarify the language so the two sections match.
I also feel that forcing them not to collaborate is not the greatest feeling. In practice though I found that the game was far to easy when all the players could just work together and it undercut the spirit of the mini-game. Maybe I will add something that chalks this rule up to how hard it can be to describe directions to someone else in real life (That's always been my experience).
Thanks for the feedback!