Although Kessel is a fairly small town, it has 2 separate town centres, Kessel-Dorp, which is built up around the town square, and Kessel-station, which is built up around the train station.
The text describes that Kessel, despite its size, has two separate areas designated as town centers: Kessel-Dorp, which is located around the town square, and Kessel-station, which is situated around the train station.