This particular product in the link above is in the sub-sub-category of “Photocards”, in the sub-category of “Cards” in the category of “Cards and Stationary”. Currently the link in the top-right corner of the product page says “Back to cards” which takes me back to a store page featuring every single product which is in the “Cards” sub-category.
I’d like to change that so that I’m taken to the “Photocards” sub-sub-category instead.
Failing that, I’d be happy with full breadcrumbs i.e. Card & Stationary / Cards / Photocards
For full breadcrumbs you need to get the premium theme. As for changing this in the free… I’ll see what I can do in the next update, right now it just shows the first term but I can try and get it to show the deepest term.