Hi Job, thanks a lot for making it clear! The question is coming from my recent practice. I got a page and a category with the same slug and everything worked fine. Then I created another page and a category with the same slug. The product category never opened a page with categories when I was addressing it by typing its slug after site url. I was always redirected to other places (blog posts, product pages, even image file). Hence, I suggested that this redirection happened because I created two items inside of WordPress with the same slug. However, now (thanks to your answer as well) I understand that the reason was in something else.
