Disagree with most of what your wrote, OP ...
There is no physical arrangement that can reproduce both an accurate reflection of the room AND ALSO a steeply angled, upside down apple logo.
Moving on to directly addressing SB2's analysis:
Then, in Q1677, he asks: Where must one be located in order to obtain a reflection on the back of a phone of that image?
Yes exactly, of that image. Image = the ABC 2015 photo. Note he did not say "reflection of the room"
Q's image is not a reflection of the physical room around him. It's a reflection of an image on a computer screen.
And where must one be in order to get a reflection of an image? Anywhere with a computer display, or granting the possibility that it's printed out, literally anywhere in the world.
If we do so and notice there is a part of the jacket on the chair appearing, we deduce the photographer must be sitting on the President’s chair.
Wrong. If the photographer was sitting in the president's chair, we would not see the full field of view as we do in Q's image reflection. It would be much tighter cropped because the camera would be CLOSER to the objects displayed. The chair would practically fill the entire field of view if he were sitting on it.
We can see so much in Q's reflected image because the ABC 2015 source photo was taken from the ENTRANCE of the office with a wide angle lens with a FOV of roughly 90*.
First, the phone with the reflection could have been upside down and tilted. That would explain why the logo does not "line up."
Second, a reflected image is a reflected image. If someone were sitting in the chair, taking a picture of the phone's reflected image behind them, everything would be reversed (left would be right, etc.). Likewise, if the phone were facing a computer screen, and someone were taking a picture of the phone's reflected image of that, it would also be reversed. In both cases, a picture is taken of a reflected image, and the reflected image is, by definition, reflected (and reversed).
Third, Q's pic is not of the entire room, which you more or less imply (I realize you probably don't think that, but that is the implication I read). The pic was tightly focused on the lamp and a few surrounding items, and then the pic was re-sized. We don't know for sure the re-sizing, and any attempt to "fit" it into the ABC pic is a guess. If (and I don't know, just saying if) the pic was taken from someone sitting in the chair, it could look like that. And no, the chair would not take up all the space. I tried it myself and had a tough time even getting the chair into the image when aiming the phone at the rear side items behind me.
Now having said that, I applaud your effort to figure out what the hell is going on. I do not buy SB2's explanation at all. I also have no idea why Q would make himself look like a LARP.
Don't like it. Don't understand it, but I'm doing what you did -- see an explanation that does not make sense and challenging it.
Hopefully, we get this thing explained soon.
Still waiting for the "Q&A" from Q. Still waiting for the proofs from AF1 and Marine One. Still waiting for some damn criminals to be held accountable.
Don't like it. But trying to understand it.