Are your lug nuts jacketed or solid? Most likely if the nuts are factory, they are jacketed. If you have the jacket lug nuts, the lug nut gets rust forming between the inner lug nut and the outer jacket. This swells the outer diameter of the nut so the socket does not fit the nut anymore.
A lot of vehicles use jacketed lug nuts and have this same problem over time.https://www.glocktalk.com/threads/ford- ... 992/page-4http://www.grrrr8.net/showthread.php?t=41006http://www.dodgedakota.net/boards/gen/24767.html
You may want to find some solid lug nuts if you have the jacketed lug nuts to eliminate the problem or just replace them. After a few more years, you may find the socket that fits today does not fit the nut again.