Exactly no need to adjust brightness at night when the bright white melts your pupil and you go blind for 30seconds
The edit feature is meant so that you can fix any mistakes in your post. The limit is set at 5 minutes to help prevent abuse.
On iPad, when you go back, it still shows a white page of forums from a few weeks ago. Is this just a temporary bug? If it helps, I have the newest version of iOS.