Display with category grouping

-- url of the page with the problem -- : ertmania.dk/webshop
-- HikaShop version -- : 3.5.1.
-- Joomla version -- : 3.9.0.
-- PHP version -- : 7
-- Browser(s) name and version -- : Firefox

I want to display products in categories just like: demo.hikashop.com/index.php/en/hikashop/...th-category-grouping
I use product listing in a menu item.
My problem is that the main category shows all products on top of my two categories with products.

Solved it:
I removed the parent category under each product.

Hello,

Thank you for your feedback !

Kind regards,
Mohamed Thelji.