I'm about halfway through book 3, with all the trains, and it's happened so often that I had to post about it. Please, please, please no spoilers.
Whenever Carl or another character says something like "We are going to avoid Station 57 because we aren't equipped to fight a boss." I just nod my head along and go yep, I totally knew bosses are at Station 57. But it happens with like every description of them trying to figure out the trains.
None of it makes any sense to me, so I'm just along for the ride.
I'm sure the author spent a lot of time trying to figure out some logic or something, but I don't have the willpower to try and follow him along this journey.
EDIT: Thank you for the explanations. And I'm loving this series by the way, don't take my criticism seriously. These are some of the best books I've ever listened to.