But you also disabled ability to view topics only from parent category, without topics from sub-categories. 
Wouldn’t it be better to have same logic here as on main page? I mean - press “latest” button to view latest from this category, press “new” to view new, etc And then you can place topics from only parent category where latest shows now - I think it makes more sense. I probably explained situation in a bad way - language barier, sorry. Here’s another screenshot explaining my solution on how to view topics only from root category. We probably should have just a checkbox in admin panel “show topics from subcategories in parent category” - this is always on right now, but I would like very much to turn it off.
