On any episode of 7th Heaven look carefully as Annie, or any member of the family walks into Mary or Lucy's room. You will notice that when they walk in they come out of the closet and when they go away they walk into the closet.
I don't really think it is a closet, I think it might be that there isn't room for a closet so the clothes and other closet stuff are kept in the hallway to the stairs.
Well, actually, my friend has that kind of closet that is connnected to her mom's room and to her room. They just share one closet.It's not a hallway because the scenes in the hallway don't have a bunch a clothes! Just letting you know.
I think that there is another door because they wouldn't go in and out through the closet and they probably would have realized it by now. So I don't think that its a slip-up.
This is not a slip up. If you guys would remember from the earlier episodes from when Mary and Lucy and Annie were making the attic better, they decided to use the doorway as a closet since there wasn't room anywhere else. So it is not a slip up.
This isn't a slip up, that is just the way they built the attic room...they talk about it being built that way around the time that Matt is leaving for college and Annie wants him to live up there.