Again, you're ignoring the fact that Roberts said Oswald was zipping up the jacket as he went out. This is a specific recall.
Just like Baker recalled seeing Oswald wearing a jacket.
You're comparing the low stress environment that Roberts was in while inside the rooming house with the very high stress environment that Baker was dealing with right after gun shots were fired at the President of the United States. I find that to be very lame.
Yet another post that ignores the fact that Roberts said Oswald was zipping up the jacket as he went out.
Roberts saw Oswald zipping it up. That is one difference between Roberts and Baker.