I just created a new stack. I see you can drag a note and if you put it over a stack, it goes into the stack. However, if I have a screen full of notes, I have no way to tell whether I have already 'filed' a given note into a stack or not.
I just pulled a note into the stack I created, and then clicked around and did something else, and then pulled the SAME note into the stack I create - because I didn't know I had already associated it with that stack. When I opened the stack, I had two copies of that note. But they are still in the main group; and it makes it hard to know which note I've put in which stack. Which means I'm duplicating work or missing some notes I might want in a given stack.
I write first and file later, so it's helpful to know what has to be moved where. Thanks.