Yes, I mean this section. The reason why it opens "correctly" is that I created a new cathegory blog menu item. But then the features of the template (sidebar with round picture and joomla fields) are not working. Before this new menu item it opened but with all modules of the homepage.
You can see the issue on the page Unternehmen as well . When you scroll down you can open an article out of the cathegory blog in combination with News Show Pro. There you can see that all modules of the page "Unternehmen" stay opened.