Well!
Team Keep LHO Off Them Steps have the following story to tell:
1. Here's Mr. Lovelady in the Hughes film, standing way over west, behind the black man who is by the white west column---------------
2. As the limousine passes the building, Mr. Lovelady moves east and shows up like this in Bell---------------
However!
Subtract from the Bell clip above the tiny amount of time it takes for the limousine to cover
half its own length, and we get this in Towner-----------------
Red Arrow: Ms. Madie Reese
Yellow Arrow: Somebody exactly where Reddish Shirt Man in Hughes was standing just an
instant ago
Blue Arrow: A. N. Other, standing a little west of Ms. Reese and a little east of Reddish Shirt Man
'Don't be silly!' cries today's
Team Keep LHO Off Them Steps spokesman, 'A.N.Other is just Lovelady (aka Reddish Shirt Man), he has stepped to his right. The person marked by the Yellow Arrow is the person behind him (PrayerWOMAN or Shelley), who has come down off the landing to take up the spot just vacated by Lovelady.'
Uh............ nope.
The reflection of the person behind Reddish Shirt Man in the glass door in Hughes shows that s/he is wearing BLUE:
Whereas Towner shows that the person standing behind the black man is showing up REDDISH:
Ergo! The person standing behind the black man in Towner must be the same person as the person standing behind the black man in Hughes just an instant earlier, i.e Reddish Shirt Man, i.e. Mr. Lee Harvey Oswald.
And A.N.Other, the person in Towner standing about midway between Reddish Shirt Man and Ms. Reese, must be Mr. Billy Lovelady, who is just half a limousine's length away from shifting back to his left and returning to normal standing posture
at a spot east enough to place his right shoulder right behind Ms. Reese's elbow:
The only outstanding mystery here is what is the white & blue (with a hint of red down below in the last frame of the clip?) from behind which Mr. Lovelady comes into view?