Yep fully aware that we agree that light is projecting in many directions.
What part of "the sun has a top and a bottom" suggests i think that? You have said yourself that this is about light rays being pulled upwards yes? So put aside the complicated job of accounting for every single direction of light for a second, and it seems obvious to me that where an object is project rays that go downwards then up again (and yes, there are rays that just go straight, and rays that go up, and they are pulled upwards accordingly and never seen) but the light rays from the top of an object, would have more light rays curving downwards and then moving upwards without hitting the earth, then the bottom of that object.
As for the mountain idea: how is that absurd? If SOME rays of light are starting to go downwards then being pushed upwards, then you have that problem. I think we've previously agreed that this "force" or whatever you want to call it is pulling upwards on ALL rays of light yes? (i.e. remember that time i drew a diagram showing rays of light that WEREN'T pulled upwards and you pointed out how silly that was?)
So yes, light goes in all directions, however SOME rays of light, are obviously going to start going downwards slightly, and then be pulled upwards and never appear to the viewer... the point the sun "sets" is where the rays of light transition from being curved towards the viewer, to being curved up in to the sky yes? Ergo... if the observer goes higher, then they rays of light will be curved upwards in to their eye... Observers at ground level will ALSO have this happen... but the effect will be a lot more noticeable up a mountain. And yes, i agree, sun set will appear later up a mountain, just like real life... but i think you need to refer back to your parabolic path example of how forces work. Notice the shape? That would be the same for the rays of light, but upside down right?