I've created 1 access level called "Visitors".. By meant

I've created 1 access level called "Visitors".. By meant of "testing", I've dropped all the Rules from the right side into the Negative Rules.. Then I go out the Access Level Settings..

When I came back to Visitors to check the Rules, all Rules go back to it's original place on the right, except a few rules.. Why is this happened? Seems like the Rules refused to be "ruled"…

Thanks!