How does Jeff's father misinterpret Jeff's desire to change his old room in the novel, When Jeff Comes Home?

Over the course of the novel, Jeff's father, Ken, shows some sensitivity to Jeff's needs by changing things in his environment and agrees to get rid of his eighth-grade room. Perhaps Ken Hart is beginning to get the picture, but he seems to be reducing Jeff's problem down to the fact that he's grown up and feels out of place in the room of a younger boy. What truly makes Jeff want to change his room is not that he's no longer a young boy, but that he's no longer the same boy. Nothing feels familiar to him, in part because he lives within his own mind. His tortured memories of his home with Ray seem more real to him than his family home, and it will take a long time before Jeff can feel comfortable in the strange, "normal" world where he once belonged.