I'm still learning WP, so this might seem pretty obvious to veterans.

I've been given admin rights to a WordPress site and told to replicate what my predecessor did with a specific pair of pages.

These two pages show a number of posts that belong to a specific category (catA). Additionally, each page further filters the posts by their respective tag (tag1 and tag2).

What's weird is that the URL of the two pages shows their tag, not the category. Example: www.examplewpsite/tag/tag1/

My guess is that there's a defined link between the category and the tags, and have even found styling for the category that acts on the tags, but I am unsure of how to add more tags to this link.

If anyone can point me in the right direction to find and edit this link, it would be a huge help.