"I wish our room is a girl's room." Because of Jennifer Hutchinson's ghost clouding her mind, Jo couldn't quite figure out that having a boy's room made no sense, but she could conclude that she didn't want it. And that was enough to wish it away.
The room changed into a girl's room, complete with dresses, shoes, scattered pink items, and old homework assignments bearing Jo's name instead of Jon's. It didn't change into a room for two girls, given the ambiguity in the wish. And with it came a change in reality.
In the new reality, Jo had always been a girl, rather than having been transformed by a ghost who then messed with her memories. Jo, Karyn, Sarah, and Jack had gone to the old haunted house. The ghost had then merged, transformed, and separated them, creating Jo and Jen, Kara, and Lyn. Just like before--except that Jon was no longer part of reality. And since Jo wouldn't accept a dare, she had been dragged along by the others.
Jen caught up with Jo and they went outside to join the others in the car.
"Okay," said Kara, "now that Jen has real clothes, it's me next." Because she didn't hear the wish to make Jen not-carsick, she now believed that the only reason they went to Jen and Jo's place was to change clothes. The clothes change was also a wish, but the new reality was that Jen had gone home and put them on, not that she was wearing them all along, so everyone still remembered the moth-eaten overcoat.
"Yeah," said Lyn. She drove to the end of the street--then stopped. "Wait a minute. Your house... It's that way." She pointed to the right. "Or was it that way?" she said, pointing to the left. "Funny thing is, I'm not sure. Where is your house?"
Jen the ghost, of course, had merged Karyn and Sarah but couldn't make Kara's memories consistent to the last detail. She realized that she had better fix this and picked the direction to the right, enforcing it with her magical powers.
"Oh, it's to the right," said Kara, indicating the way to Karyn's house.
"Yeah," said Lyn. "Of course it is. I don't know what came over me."
They soon arrived at Karyn's house. Lyn parked and they approached the entrance. Jen realized, though, that this would have the same problem she had at Jen and Jo's house: she had only changed memories and reactions, not physical things such as boys' clothes. Jen could make Karyn's parents think their daughter is Kara, but she couldn't fix the evidence in Karyn's room.
The best she could do was make everyone magically not realize it was a big deal, like she did before. And there wasn't as much difference between Karyn's room and Kara's as there was between Jon's room and a room meant for a girl, let alone one meant for two girls. Still, this was only a stopgap measure. At some point, she would either have to get that stone, or get to some place where the ley lines meet.
