Categories not Linking to Products

I’ve been having this issue with the menu on our site. All the categories I am able to add to the menu are from the “posts” section of WP, and categories from the “product manager” section do not show up when I’m trying to build our menu.

I’m trying to make a drop down menu that has all the store products divided into categories, like I said the only problem is that the only categories that show up when I’m editing the menu are from “posts” in WP, none of my categories in “products manger” that are linked to my products in shopperpress will show up when I’m building the menu.

Isn’t Shopperpress supposed to override WP in situations like this?