I note that on both the the theme customisation page (default portfolio grid settings) and individual portfolio page options, there is a feature to include/exclude certain categories. I'm trying to get only A,B,C to display on the grid, excluding D (I do not want items in D to be shown, nor do I want a category - which houses only D items - to be displayed in the filter. So I check A,B,C and leave D unchecked... but it doesn't seem to be working. Would appreciate your advice please. Thanks!