Just updated to iOS 8 on my iPhone and it changed my ringtone and don't let me change it back?

So I just updated to iOS 8 yesterday, but today all of a sudden my ringtone changed to a ding sound opposed to the original notification noise when I get texts. So I was like okay weird but no big deal I'll just change it back. So I went to settings and sounds and found the original ringtone and chose it. But when I went back out it didn't save. So I kept trying over and over and it still will not save it. It keeps going back to the ding ringtone. Am I doing something wrong? Any help?

Nope iPhones are crazy!