Brand not displaying the desired outcome

hello,

I created an html block that includes all the brands. One brand could be assigned to more then 1 products in this e-shop. The html block is visible on the home page on the menu bar. I noticed:

1. When the slug of the product has a word that matches exactly with the slug name of the brand then when you click on this brand it takes you to the single product page of this brand. however if there is more than 1 products connected with this brand only 1 is visible.

2. When a product is not linked to a brand but the slug name of the product has a word that matches exactly with the slug name of the brand then when you click on this brand it takes you to the single product page of this product which could be irrelevant to this brand.

The desired outcome would be for the slug name of the product to not be connected to the slug name of the brand but the product to be connected with the brand chosen manually. Also if more then 1 products are connected with a brand the desired outcome would be for the products to be displayed on the shop page for the customer to choose.

Kind regards,
Eleni