I am using the vertical menu for the categories of my products. However, when I click on one of them, the resulting archive of products is all messed up. Also, If I just type the URL http://www.mysite.com/categories/product-category, the results are all messed up too. The weird thing is that this only happens if the category page is accessed from another page, a menu or from the URL search bar. If I first go to the shop page and then filter by category with the filters sidebar, it works perfectly. Actually, you can see that if you filter by category with the filter sidebar and then you copy the resulting URL and paste it, the results become messed up.