Your problem is that you accept the accounts from the above-named witnesses as if they are established facts.
No I don't.
The only established facts are that the Warren Commission Sham ignored the testimonies and statements of these men in favour of the fictional account of events Givens gave. The Sham ignored that Givens had been questioned in detail about his movements and his observations of Oswald on the day of the assassination and had never once even hinted he had returned to the 6th floor and seen Oswald near the scene of the shooting.
Why was Givens, all of a sudden, introducing this vital piece of evidence that would be used by the Sham to establish Oswald was on the 6th floor all alone after everyone else went down to lunch. This question was never asked, the new version of events was simply accepted.
Time after time in the hearings witnesses were referred back to earlier statements they had given if it differed with their testimony.
Not Givens.
Let's not forget, Oswald was on the first floor talking to Eddie Piper at 12 noon. Piper was the last employee to see Oswald, not Givens. The Sham deliberately ignored this evidence.
None of the above were keeping a time log for their activities just prior to the assassination, so when they were asked what they did and when they did it, all they could do was guess. For example, what reason would Bonnie Ray Williams have had for making a mental note of what time he arrived at the sixth-floor window or what time he left there? None whatsoever.
Each person was giving their account of what they did during lunch.
They remember Oswald trying to get on the elevator and asking for it to be sent back up to him.
They remember Oswald was trying to get down to the first floor.
But then along comes the Givens fiction - now Givens is asking Oswald if he wants to come down to the first floor when, in reality, it was Oswald asking Givens. Now Oswald is refusing to come down when, in reality, he was trying to get down to the first floor which we know he did.
And we don't need Bonnie Ray to remember what time he left the 6th floor. Norman and Jarman provide that evidence but their testimonies are also ignored by the Sham. Hank Norman heard from a police motorcycle that the motorcade was on or approaching Main Street. This timestamps when they decided to go upstairs to 12:22pm at the earliest. they walk to the corner of Elm and Houston, alongside the building on Houston Street, up to the back loading dock and in the back door. The east elevator, the one closest to the back door, was not available forcing them to walk around the elevator shaft to the west side (it was at this point Oswald saw them from the Domino Room). They then took the elevator up to the 5th and walked all the way across to the southeast side. Jarman reckons they were up there around 12:25 - 12:28pm.
It was then, and only then that Williams decided to go down to meet them - if you believe the official narrative.
We also don't know where Oswald was during the time BRW was at the window. He could have been anywhere on the 6th floor and not have been seen by BRW, and he might have been pondering his next move if BRW had remained at the 6th floor window. He might have been contemplating whether to move to the 7th floor if BRW remained in place. All of these are what-ifs that can be fun to speculate about but don't give us a clue as to what actually happened.
Wasn't Oswald hiding as quiet as a mouse in the SN?
Was Oswald the man with the scoped, high-powered rifle that Arnold spotted at the west end of the 6th floor?
Doesn't the rifle bag in the SN demonstrate that the shooter assembled his rifle there?
There is so much evidence telling us what happened up on the 6th floor.
You are the only one who doesn't have a clue.