#1 As an admin or moderator, if you are editing someone else's post there is no way to not show the post as edited. It's been requested to make this optional and it's on my list of things to do, however it's not a feature of 7.0 at this time either.
#2 What happens when you try to become this user?
#3 If I'm understanding correctly, you want the box to be checked. In 6.5.5 the box you're looking for is "Member has access rights". If this is unchecked, then that means they are banned.
