Definitely the rules are correct, zombies on a 4, 5, or 6. The example of play is technically not incorrect, three dice greater than 4 would generate zombies, but it is confusing. I think there is at least one other item wrong in the example of play, IIRC. I bet it was written before game play was finalized.
Yeah! One of the examples of play says that Tonya has a rep of 4 when it's actually 5.
But boy howdy, I wish you hadn't straightened me out on the generation rules cause That changes things significantly.