Hello, 

Town Name for this area is wrong, in OSM Nominatim Reverse Geocoder API. 
For Reference: http://nominatim.openstreetmap.org/reverse?format=json&lon=9.05515&lat=54.08000&zoom=18

returns

    "address": {
        "road": "Marner Straße",
        "town": "25704",
        "county": "Kreis Dithmarschen",
        "state": "Schleswig-Holstein",
        "postcode": "25704",
        "country": "Germany",
        "country_code": "de"
    }

As you can see, returned field "town" is the same as "postcode", this is just wrong!

Regards