Karen, the 'Device Name' label rightmost edge was set to just over the halfway point of column 1, so that may have introduced a 3rd column very similar in nature to your post. So i put the rightmost edge of 'Device Name' to align to the rightmost edge of the 2nd column and that fixed the scrolling issue.
Id really like for Device Name not to stretch the entire horizontal plane of the window but ill figure that one out later. Im running 7.6.2 by the way. Thanks for your post, it led me to what i needed!