At the exact moment that the sun sets in the West horizon for person A, it also rises on the East horizon for person B.   This is an endless chain that occurs throughout the planet.   

With a spherical earth model, the reason this happens is obvious.  However, (unless I am misunderstanding your theory), the spinning pancake model definitely does not explain this.   

How does the spinning pancake flat earth model, (or any other flat earth model), explain this?