When the train manager offers Alexandra work in exchange for food, he says "It's not my place to be charitable with the Union Pacific's goods". As is clear from the previous episode, Alexandra is traveling on the New York Central Railroad, not Union Pacific. The latter never operated east of Chicago.
There were never any trains in the US that had an open toilet in the same room as beds. The class of compartment Alexandra is in would have had a shared toilet as a separate room in the car for all passengers.