She gets out of the tub and her hair is wet, then she goes into the basement. Depending on the shot her hair switches from wet to dry.
Jimmy's truck was supposed to have a manual transmission, established during all the push-starting scenes, but it clearly has a column-mounted automatic gear selector and PRNDL indicator.
At the beginning of the film when Claire Parker's boyfriend is supposed to pick her up a man named Duke arrives instead. He tells her he works at the Salvage yard with her boyfriend and then says they had installed a new starter on the truck. He tells her to listen and revs the engine. After starting the engine that part has no effect on the running of the vehicle.
After Claire jumps out of the truck and runs to her house, she enters the house and does not lock the door behind her. It is obvious that at this point she is afraid of Duke, yet fails to secure the door.