Thanks, and I promise it's not going anywhere! lol
From what I can gather it seems like the button placement on some of these are a little inconsistent. I've noticed a similar issue with the down vests too, it might have to do with the size, but I'm pretty sure this jacket is the same size as MJF's (medium). I'm guessing that a lot of the clothes back then were more hand produced, and not as consistently machine made.
The waistband has definitely intrigued me over the years, this is purely speculation on my part, but I think the costuming people might've either rolled 1/3 of the waistband over and stitched it together to sew the Hollywood pattern jacket lining in, or trimmed it off...Because if you look at the back of his jacket it's very bunched up (which isn't how any of the Guess jackets look), and the front bottom corners of his seem to roll over on to themselves, so I'm guessing that was an alteration done to the jacket, that maybe had the added benefit of making it a little shorter to fit MJF better.
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I wish anyone actually remembered having worked on this, kept notes, knew where the original was, etc. It would've saved all of us a whole lot of brain power over the years! haha