I think there is big mistake in this episode. when we want to cross between time lines to make some change in the future,we should go to the past and do some things for change the present and future. we cannot made past with some action in present because it make loop for what happend in present so the first line of the loop has make a mistake.
ex: the hodor should be normal body in the first line of the loop to start this loop and we need to have him near brandon in the present so brandon can change the hodor to keep the door close but if hodor was normal body we can not say where was he in the present.
