I tried to explain it in this image: link to image
As you can see in the first screenshot the page that is highlighted is "Agenda" and the content is the list view of the event manager. This is correct.
In the second screenshot you see a single event shown. The highlighted page is "Vacatures". This should be "Agenda" instead, because the single event is a child of "Agenda". So the wrong page is highlighted.
The "Vacatures" page is setup as the "posts page" in "settings -> reading" in wordpress (this is the last screenshot). Also the template in which the single event is shown is the same as the one used by the "Vacature" page (blog page).
The site i'm working on is installed in Dutch. So I hope the images make everything clear for you.
My question is: I want the single event page to be shown as a child of "Agenda" and preferably without the sidebar.
Thanks in advance for the effort and your time :)