Perhaps they thought they did you a favor. Everyone knows those weird people of NRW - they like to dress strangely, then at one day they gather all together and drink and dance and do other unspeakable things. Better keep it quiet.
What surprises me in the whole story is this:
Where are all those employers? Is careers THAT US-centric that in 2 months only one employer came by? Or is that everyone laughs when they see the location of Stuttgart? Those Swabian programmers you know. But I'm not even German, I seriously can program, I really do.