I finally found time to look at this problem. This is happening because these are important cities with more than one postcode. Otherwise the program would have listed you all cities for the postcode you used. This is exactly the cities that are also known by their endonyms (how we call them outside).
Now this is a problem for me because so far I have no way to make a difference beween a municipality with more than one postcode and several municipalities with a similar name (such as Saint-Martin). I will have to find a solution because One has the right to visit Rjsel, Pariggi or Strasburk.
Because it will take time, if you want groentje I can manually record Rijsel and Parijs so you get correct counting.