Compare the Links in the Header Menu:
http://web.archive.org/web/20160501063727/http://www.rheinmediation.de/
“Leitbild Seminarprogramm Mediation & Teamklärung Beratung & Coaching Team Kontakt”
This is how I want it (and once had it done, as you see, before a data crash)
These links are a mix of ‘pages’, ‘posts’ and somehow a link to the automatically created page by the plugin events (called ‘Seminarprogramm’ here)
After the crash, it looks like
http://www.rheinmediation.de/
“Familienmediation Impressum Leitbild Team”
links, which point to ‘pages’ and are automatically created by wordpress.
I somehow managed to manipulate the content of the Header Menu but can’t remember how. I figured it’s a feature in your theme, though.
Thanks,
Rüdiger