1. We don't know, we've never been there. Why don't you go see for yourself?
2. The Earth accelerates 'upwards' through space at a constant rate of 9.8m/s/s. The resulting inertia causes our feeling of 'gravity'. According to Einstein, the effects of a gravitational field and a constant acceleration are locally indistinguishable.
3. Every other object in the universe is round? How about asteroids? Galaxies? Nebulae? There are many non-spheroid objects in the universe. Besides, just because other objects are spheroid, why must the Earth be?
4. It does go all the way around.
5. Which calculations are these? Be specific.
6. The sun's path across the Earth is not perfectly circular; it varies slightly over the course of a year.
7. The conspiracy would crack down on larger, more threatening groups; the conspiracy is very effective at convincing people the Earth is round; most people simply don't care.
8. At first, maybe, but since we are generally better able to defend our model than REers are theirs, they quickly shut up.
9. No, and how is that relevant?
10. The Earth wobbles slightly.
11. I don't know; why, you looking for a job there?