I actually typed a good bit of my life and you are correct....unless I did the same form over and over.....but this would have been a form that the clerks typed over and over. You will note that the other BCs viewable on the web all show tab stops. It could be that Obama's BC was typed by someone who only used this form occasionally. Could be.
I've never put a document together in Adobe .pdf, don't know how yet, and am not familiar with all the different scanning techniques.
Somebody pulled a number on me and had papers of mine they shouldn't. It was in .tiff format and showed up as a single document on the thumbnail but was a large file. I opened it in Photoshop CS2 and it looked strange, very long and narrow, zoomed it up and the aspect ratio was all wrong. What to do? Tried my old Paint Shop Pro, and when I opened, there were 8 or so layered documents underneath flying open on my screen. I know who had it done, but I don't know what scanner or method would have done that. So that's how I found out .tiff can be in layers, too. So much for that.
It's true about the chromatic aberration in color documents, never worked on it or zoomed in with my scanned files because there was no point for my purposes. It was the noise that I could only do so much with; scanners are much better now with that. There are various techniques to get rid of CA, at normal viewing size it isn't noticeable if done well but you can detect the grayscale halos or gradations when zoomed; cleaning further an arduous task unless there is some software than can do it. I saw the Denninger video on that.
So back to the main point, I have no idea what kind of scanner was used on the BC, probably scanned when Hawaii went to the new archival system. The article at the Hawaii paper mentioned that they were printed on the green security paper. Why not just crop it to the margins?
I like puzzling things out, So all the rest of it aside, why put two different documents out there of essentially the same thing? I agree AP only scanned what they got but can't imagine what they started with, maybe layers merged without the security paper layers. I knew something like this would happen if he released it but sure didn't expect layers, assume it's true.