The Egyptians used grids to design just about everything. Naturally, lines between points on the grid are going to intersect with points on that grid.
What you've discovered is an artifact of the system they used. It would be amazing to find that things did NOT match up with this grid. Only "some things" line up because you are using the wrong grid. Try a 4 x 3. The work has been done already.
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This 4:3 ratio was also used after Cheops' time. It was employed in the monuments of both Chephren and Mykerinos. Egypt is rich in buildings having 4:3 as the basic proportions. It is certain that this proportion has been one of primary principles of both builders and architects for thousands of years. This proportion has also been used outside Egypt and, up to our era, it has been strictly observed in the design and construction of a great number of ecclesiastical buildings in Europe. "The Sphinx Temple", Bent Heick-Hansen, Copenhagen, Sesto Congresso Internazionale Di Egittologia Vol. I, 1992 p. 243-244
Drawing something from a "quarter point" on a grid designed around one side that has quarter points MUST give you points that coincide with the design. This design has nothing whatsoever to do with your theory, though. As I said above, your "discovery" is nothing but an artifact of their design conventions.
However, your trans-generational funerary coincidences aren't even artifacts of a system, because there was no system used to create trans-generational funerary structures. They simply didn't make sense in the context of Egyptian cosmology. Khufu's complex, as Warwick pointed out in another thread, was whole and complete and functioning at the time his body was interred. There was nothing left to complete, no grand plan to continue after his death. He couldn't put his revivification "on hold" until the plateau was finished some 4 reigns later. It's completely irrational, from an Egyptian perspective.
Anthony
You can lead a horse to water but you can't make him think.