The bit about there being a contradiction between creating people after the world was created was already answered by other posters: there's no contradiction. The world is a planet, people are animals. The gods can make an animal (or a whole race of animals) and put it on a planet without changing the fundamental characteristics of that planet at all. Those animals will then make changes to the planet's surface, but they are not part of the planet. There's no Gaia hypothesis on OOTS-world.