Custom 404 page not showing up

So I made a custom error 404 Page (page cannot be found) > enter its URL into administer > settings > error handling in the 404 section > then enter a bogus URL like http://localhost/practice/jfdsfjsdklfjsdklfjdsfklsdhn to test it > my custom error 404 page is not returned. Instead, I get list item content from my home page that has a View applied to it. This is really strange.I'm using clean URLs, Pathauto, and 4.7.3. I also took the View off my home page > tried another arbitrary URL > no luck, my custom 404 page was not returned.Maybe it has something to do with Pathauto? It automatically created a URL with the title of the Page, but I deleted that one, and made a new URL alias for it of "404". I enter "404" into the error handling section > still does not work.Any ideas? Thanks in advance :-)