The problem with D&D is that they have no respect for the source material. As the actor who plays Barristan said in that interview he thinks that after this season they going to think "now what". Without being grounded in the source material they are going totally off the rails and a lot of people are realizing this.
I always interpreted the scene where Sandor warns Sansa to hurry as him being outside her bedroom and not inside. Later it says "when she emerged she walked on the Hound's left side", giving me this impression.