The error in mis-spelling of "Morden" as "Modern" is probably one of the least exciting things I can think of.
For once, we agree. It's just that your obsession with it is a bit peculiar, to say the least.
I'm just curious about "What is the connection between Alexander Gleason, an American Civil Engineer, Joseph Christopher, a retired English merchant, Morden College, a charity home for poor retired merchants such as Joseph Christopher
What is so surprising or interesting about two people working together to produce a print? Or is it the fact that an elderly man lived in a retirement home? (You are of course incorrect about it being a "home for poor retired merchants" - that stopped being the case many decades before J. S. Christopher moved there. But you knew that already!)
and a map which is a copy of the Unipolar Azimuthal Equidistant Projection of the globe."
This continues to be incorrect regardless of however many times you say it.
From all appearances, the map is at least based on the AEP. It certain resembles the AEP. And it is noted as a projection.