How do extra frames happen? Why would there be that disparity if they come from the same source originally?
Well, I really don’t know, so I am sure other people know better than I, but I had a couple ideas. The frames missing from the 35mm at the reel changes could be a result of the ends of the reel breaking from lots of handling. The other missing frames could be from times when the film broke during playing, ruining a frame or three, and then being spliced back together. Why reel 3 had so many more missing frames compared to the others could be because it was a more used reel from a different set, I suppose. Another idea I had was that there was more than one original source. Just as the audio master kept changing, so did the film edit master. That’s all I could come up with with my NO knowledge of such things. 😃
As for the footage differences with Harmy’s, I guess that’s from Harmy doing his best, brilliant trickery to recreate the original from remastered sources that used slightly different footage. Again, I can only guess.