Related products woocommerce + description blog archives

Hi,

As I add more products to my store I notice that the related products feature on the single-product page only randomizes from the first few products I added to the store. How can I make sure this randomizes through all of the available products in the game category?

Example single product page:

https://www.poke-spot.com/shop/ex/manectric-ex-full-art-copy/

Another thing I want to change is that whenever a category for an article is chosen on the site, it titles it: Archive for category: Category name. I want this to just be the category name and remove the “archive for category” text completely, for all categories.

Example blog category page:

https://www.poke-spot.com/deck-reviews/

Thanks!