There are in fact two settlements in this area - Banatska Palanka and Stara Palanka ("Old Palanka"). Stara Palanka is not officially regarded as a separate settlement, but as part of Banatska Palanka.
The text states that there are two settlements: Banatska Palanka and Stara Palanka ("Old Palanka").  Stara Palanka is not legally classified as a distinct settlement, but it's integrated into Banatska Palanka.