What exactly am I buying into?

[Coelho]

The bible once stated that the world was flat, and that was proven wrong, they removed it and put it under the rug.

Does it really? From what i remember, the Bible was the first text to talk about the roundness of the earth, and about the fact that it floats in the space.
Another texts, from the same time, but from another religions, would say that earth was flat, supported by elephants, turtles, and such.

"He stretcheth out the north over the empty place, and hangeth the earth upon nothing."(Job 26:7)

"And it is turned round about by his counsels: that they may do whatsoever he commandeth them upon the face of the world in the earth." (Job 37:12)

"It is he that sitteth upon the circle of the earth (...) "(Isaiah 40:22)