The explorer widow has a lot of empty space between the objects and the edge. Now this wouldn’t be a problem but when selecting objects/descendants that go further it forces it to auto scroll to the right. With the empty white space this causes everything else to go out of view and forces you to expand the explorer window to see what you are trying to work with.
Everything fits in the window but you can see the scroll and the empty space:

It forcing the scroll, and cutting things out of view with the immense amount of empty space:
