Referencing Categories in another table

[Kat]

Good Evening,

I'm building an app for my mom, but am having issues with the groceries section. 

In the "Cart_Details_Inline" view I want the groceries to be sorted by category as they are in the "Groceries" view.  I've used a virtual column in the "Cart_Details" table to reference the Category column in the "Groceries" table.  Problem is, instead of categorizing by that column it is listing every category in the app.  How do I fix this?

Thank you!