Jon saw all the Sarahs synchronise even more so than they had before. If he was able to tell anyone apart before, he definitely couldn't now. Suddenly, two of the Sarahs in the room started to move together, joined by a force seemed out of control. "Oh my god, what is happening-" they exclaimed at the same time.
There was a flash of light, and then one from another room.
When Jon opened his eyes, he saw a Sarah standing in front of him. Just one. Not two, just one. Then, from another room came another Sarah that used to be two. He didn't know which Sarah was a combination of which person, but he didn't care right now.
The four-now-two Sarahs let out a Keanu Reeves-esque "Woah" as they realize what might happen now that they've merged-- the whole town might be absorbed into one Sarah!
Jon doesn't know what to do. He wants to meet up with the real Sarah before it's too late, but he doesn't know if he can ever restore everyone to who they were before-- especially now that people are merging.