Adams is absolutely insistent and consistent on one point in every statement she ever made concerning her actions that day - she started heading for the stairs within seconds of the final shot and she was running. This is corroborated by subsequent statements made by both Styles and Garner. She is also consistent in saying she saw no-one on the stairs.
We know from the Couch and Darnell films Shelley and Lovelady were out front of the TSBD when Baker reached the foot of the steps outside the front entrance.
If we accept this evidence we must come to the conclusion that Adams could not possibly have seen Shelley and Lovelady on the first floor. It's impossible.
So we are left with two main possibilities - Adams lied about seeing Shelley and Lovelady on the first floor or this part of her WC testimony was added without her knowledge.
Lets look at motives. Why would Adams lie about this detail? I have no idea why she might do this but would be glad to hear some wild speculation about it. Why would the WC lie about this detail? I think that's obvious - to make it appear that Adams and Styles could not have been on the stairs at the same time as Oswald.
When Garner reached her office door Adams and Styles were already clattering down the 'very noisy' wooden stairs, she heard them clearly. She then moved closer to the area of the stairs where she would have and unobstructed view of anyone opening the door of the stairs coming down from the fifth floor and crossing the floor to go down the stairs to the third. More importantly, she would have heard anyone coming down. She was there moments later when Baker came up those same stairs. Oswald never came down those stairs. Adams never saw Shelley and Lovelady on the first floor. Of these things we can be certain.
Adam's is also consistent as is Styles that they were sent back to the TSBD by a police officer. The back of the building was not sealed off by Sergeant Harkness until after 12:36. At least 5 minutes after the shooting. How LHO slipped past the 4th floor is a matter of conjecture, but Adam's and Styles were still on the 4th floor when he went past it.
Mr. BELIN - How long did it take you after that to have the back part sealed off?
Mr. HARKNESS - The guard was arriving by the time I got off my motorcycle. There was already additional squads en route.
Mr. BELIN - How soon after 12:36 p.m., would you say the building was sealed off?
Mr. HARKNESS - It was sealed off then because I was back there and two other men.
Mr. BELIN - You are talking about the back part of the building?
Mr. HARKNESS - Yes, sir.
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This is confirmed by Inspector Sawyer:
Mr. BELIN. When you say check the security on the building, what do you mean by that?
Mr. SAWYER. Well, to be sure it was covered off properly, and then posted two men on the front entrance with instructions not to let anyone in or out.
Mr. BELIN. What about the rear entrance?
Mr. SAWYER. We'll, I also had the sergeant go around and check to be sure that all of those were covered, although he told me that they were already covered.
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Mr. BELIN. To go up and look around and come down?
Mr. SAWYER. To look around on the floor. How long it took to go up, it couldn't have been over 3 minutes at the most from the time we left, got up and back down.
Mr. BELIN. Then that would put it around no sooner than 12:37, if you heard the call at 12:34?
Mr. SAWYER. Yes, sir.
Mr. BELIN. Then you got down and what did you do?
Mr. SAWYER. I asked the Sergeant to doublecheck the security around the building, and then I took two patrolmen and stationed them at the front door and told them, with instructions not to let anybody in or out.
Mr. BELIN. Now up to the time you did this, had anyone else sealed off the building, that you know of?
Mr. SAWYER. When I arrived, the sergeant told me he had the building sealed off. There were officers all around the building. To the best of my recollection, there was no officer actually stationed on the front door, at the front door. There was some on the sidewalk in front of the front door, and also, as far as I know, had no instructions been issued to anyone to let anybody in or out.