My experience is that they all show when an edit was made.
My issue is that the option to edit is very short.
I would like a buigger window of opportunity or at least be able to ask a mod to open up an edit window (for good reasons).
I feel the same way, it's frustrating when I sold out plants and I want to edit a sold sign after the plant. It's either I have to post in the thread that it's sold out (which some concur that I want my thread to go up the top). I tried copy and paste as a post- and it looks ridiculously repetitious. Lots of clutter.