I´ve checked the issue again with Windows 7 an IE 11 and with Windows 7 an Firefox 42.0. But the problem is still there. If you click on "Profil", "Werte", "Beratung" in the menu, the page scrolls to the right anchor-position at first, so that you can read the title of the module like "Profil", "Werte" etc. But just after a second the page flips up a little bit, so that the title of the module hides behind the menu again. It must have something to do with the animation-effect, but I can´t find the solution.
Could you please try again and help me?
Thank you very much!