What ingenious natural & process is it, than can get 9+ zillions bodies to get into the right orbit simultaniously or sequentially and have them remain there for billions of years? the 30 meter asteroid nearing us notwithstanding?
What do you mean, "right" orbit? Is the a chart of where all the planets and asteroids are supposed to be that you are checking? And orbits degrade and change over time, so they haven't been the same. Does that make the orbits of the past "right" or the current one? Or the one in the middle.
even the biggest asteroids are sperical.
Anything that obtains enough mass will begin to collapes in to a shape resembling something spherical, but it is is a sphere.
And what in the world does the three body problem have to do with cricket? or croquet?