Why doesn’t Vladek get off the train in Sosnowiec? How does he end up in the city of Lublin? How does he eventually get to Sosnowiec?

He boards a train, which takes him through occupied Poland towards Sosnowiec, but the train travels past Sosnowiec (now officially part of Germany) and into the German-controlled government of the Reich Protectorate to the east (formerly central Poland). He is finally let off in Lublin, in the heart of the Reich Protectorate. Vladek tells them that he has a cousin in Lublin. That night, Vladek leaves his tent to go to the bathroom and a guard begins to shoot at him. Vladek runs immediately back into his tent. The next morning the cousin arrives, and Vladek is set free. A few days later, he boards a train for Sosnowiec.