Hi dear friend,
There is a small issue for after the header option so please use on the header option to show the description on the header on desktop and mobile.
I have explained the details for you with the screenshot, please look at it for more details.
Also, notice that show products option only show the products and hide the header and subcategories.
This is one of our styles for the theme and the design is such as this.
If you want to have Header, the subcategories will appear on the header on the desktop when you activate categories and product options.
If you point the other query, please explain with the detail with the Screen shot, I will do it for you if possible.
Best Regards.