hey user with ip address 188.8.131.52 you stumbled onto a bug in semantic wiki. If you click the in page  next to agenda points, that link takes you to the agenda points template page. And editing there means that all event pages will show your text :-(
I've placed your text on the correct page, but now you might have to reedit again. IMPORTANT USE the toolbar " EDIT WITH FORM " or " EDIT " buttons.