I think ita just a matter of content design. Maybe it should be called new view and not modified. It’s in fact just a new view of the data, thats it. The original data stays the same. There is no new copy of the data.
Yup, what mangooly said. Oh, and you can’t delete the original view; only the modified view will have the trash can icon next to it. So, if you only want one view, you have to delete the modified view.