Don't know if this has been discussed at all recently, and if it has, my apologies, but I found this a bit confusing. Clementine calls out "Daddy", presumably from seeing Lee through the window, in the first episode, only to sadly say that he isn't her father when he answers. But according to Clem in episode 3, she saw Lee outside her treehouse, and presumably saw him going inside. So wouldn't she have already known that he wasn't her father?
The only thing I can think of that would make this a plausible sequence of events is that Clementine hid and didn't watch as Lee went inside, and probably assumed he'd just gone away like the man before, then saw him through the window and so on and so forth.
Or maybe Clementine was just messing with him and making up a story to change the grim topic at the time. :P
Lee: "The door was open."
Clem: (Oh, crap! An inconsistency!) "Yeah, he was dumb..." (Nice save)
But seriously, I suppose that sequence of events could make sense, but it still seems a bit odd to me, especially since, if you wanted to, you could spend the entire time listening to the messages from Diana in the darkness of the living room, far from the window and rendering it impossible for Clementine to see Lee before calling out for her dad. A small (possible) inconsistency in the long run, yes, but still something that stuck out to me.