Havia Bran ainda empertigado e no controle de Hodor quando Hodor estava segurando a porta?

De acordo com Wikia :

It is revealed that Hodor's disability was caused by Bran inadvertently warging into Wylis, linking the minds of the present-day Hodor and the young stableboy from the past. This mental trauma caused Wylis to seize. As he did, he heard Meera shouting the phrase "Hold the door!" through Bran and began repeating it, eventually slurring the sentence together enough to reduce it to a single word: "Hodor." Through Bran's warging, young Wylis has experienced his own future death, destroying his mind. Hodor's entire purpose is revealed to be to hold the door at this point in time so that Bran may escape, even at the cost of his own life. While Bran and Meera escape, Hodor is torn to shreds by the wights that have broken through parts of the door, but despite everything he held the door.

Assim, o momento em que o jovem Hodor caiu no chão em um ataque foi no momento em que Bran acidentalmente sai do Hodor e entra no jovem Hodor. Então ele realmente se sacrificou pela segurança de Bran.

De acordo com Kristian Nairn no New York Times :

Did the fact that Bran was responsible for not only his death, but also his simple-mindedness change your idea about the nature of their relationship?

No it doesn’t. Although Bran was responsible for the whole chain of events that killed Hodor, Hodor didn’t have to hold that door. He wasn’t being warged into at that stage. It was Meera who asked him to hold the door, it wasn’t Bran. He wants to protect the little guy. That’s all he’s ever done. He wants to help — this is the ultimate helping hand here. I just think he would be happy they could continue without him.

Uma teoria que eu gosto é que a jovem "consciência" de Hodor (em pleno funcionamento) entrou no grande corpo de Hodor, como fez Bran, certamente com a "ajuda" de Bran.

Pelo que eu entendo a cena, Bran ainda é atacado em Hodor, mas ele simultaneamente se esquivou (por engano) de Hodor do passado.

A ordem mental que Bran dá a Hodor nos dias atuais ("segure a porta") precisa ser muito poderosa porque Hodor sabe que ele vai morrer. Bran precisa de um controle total sobre a mente de Hodor para fazê-lo aceitar sua morte e manter essa porta, ele precisa destruir qualquer desejo de fugir. Na verdade, ele destrói qualquer outro pensamento que não seja "Segure a porta", mas essa alteração mental também ocorre no passado e torna Hodor como o conhecemos