I used Zedge to obtain a couple of clips for ringtones. I attached one ringtone "A" to calls in general through Settings, and I attached a different ringtone "B" to a specific single contact.
Now, sometimes calls will play "B" ringtone versus "A" ringtone. Haven't figured out a pattern to when it will choose the "B" ringtone.
Now, sometimes calls will play "B" ringtone versus "A" ringtone. Haven't figured out a pattern to when it will choose the "B" ringtone.