I made a mistake today. I noticed some of my favourites were in the wrong place, and set out to correct that. DA has a cool drag and drop system. It works ...except when it doesn't.
It makes sense that favourites can be in multiple folders at once. What doesn't make sense is that moving things, or removing them from a folder while keeping in them in another folder doesn't seem to exist, or if it does, I didn't see it. In the end, I ended up unfavouriting and re-favouriting things, which I hope doesn't annoy the artists in question. However, that messes the order in the favourites folder since it goes by date favourited/added to the folder...