Could you, please, create new topic for the new questions that are not related to the first one? It will help us to avoid misunderstanding for our support.
If you want to display products into 3 columns:
1) Add the new class “grid-col-3” for the row where all the products are located https://prnt.sc/ofpakl
2) Change the class for the product columns, use “col-md-4” instead of “col-md-3” https://prnt.sc/ofpakl
3) Add the following CSS code to your custom CSS