Well if that's true, then I wonder [spoiler]why she didn't stay in the room and wait for it to change so she could join Barnabas back in RT?[/spoiler]
That's an excellent question.
[spoiler]Could it be perhaps she did try but the hole in time from PT to RT was destroyed by the fire?[/spoiler]
But that could very well be the explanation. Perhaps the change in the room simply became one way (from RT to PT), or perhaps people could view the other time from their vantage point in their time but they could no longer cross into it. And presumably Barnabas [spoiler]assumed that Roxanne had died in the fire. Quentin never mentioned seeing the young girl in front of Barnabas.[/spoiler]