This discussion may contain spoilers!
This might have been brought up already and if so, sorry, but this has been bothering me....
When Carver comes to the cabin, Sarah is afraid of him but has no idea who he is. I thought that was a little weird then, but thought it would be explained. However, when they are taken by Carver and crew to Generic Undead Lowes, she seems to remember things.
She confuses me. I'm trying to figure out if there is something going on with her developmentally, but its really generic so it seems like its shoehorning her into the plot. Maybe someone else has another opinion.