Not What Karyn Wanted

"Sarah McMillan, you're Jon Madison!" Instantly, both Sarahs were gone. In their places were two Jons. Both completely identical. "Karyn, what's going on?" they said in unison. They turned to each other and said "I don't know who you are, but stop copying me." Karyn was stunned. How was she going to get the *real* Jon back to normal? Or was a "new" Jon just as good as the "original" Jon?