First, you are going to africa twice.

Second, if you were a customs officer in Santiago, what would you think about someone going to Bogota *twice* without stopping?

Third, are you stopping anywhere? Seems like you are mileage running the entire trip.

All I can say is have a good trip and pack a butt donut, because that's a *lot* of flying. But just be careful and use your head. These are countries you are going into, not just letters on a page.