It sounds like you do not have the same layout set for the new pages. If you go to one of your newly created overviews and look at the 'properties' tab on the right of the screen, you'll see an attrbute 'Layout'. Compare this to the 'Layout' set for your CourseOverview page. You can then change it to the same layout.
Incidentally, you can pre-select layouts when creating a new page, in the top right corner of the page wizard.
...and your answer sound true... I had imagined that the problem was the layout, but I did not know how to fix, and where to correct, after creating the page. I saw the video another time, I think there is the same problem. Thank you Christiaan