It talks about how the Earth would be flipped upside-down.

This means the Earth would now be rotating backward relative to its' path around the Sun.

Also, if this Dark Star (Dwarf Star) were in a very long locked orbit with our sun, then could this have happened before?

Maybe not to Earth, but let's say another Planet?

If so, would this planet have a rotation that is in a counter spin to the Earth's spin?

Are there any planets in our solar system that spin opposite to the Earth that reside in the Inner Solar System?

There is one, and it's about as big as Earth.... it's Venus.

Venus spins opposite the way most of our planets do, including our own. Why?

The formation of the Solar System tends to have all objects spinning in the same relative direction as their orbits.... even our moons.

But for some reason Venus spins the wrong way.

What would happen if our Earth flipped and began spinning the wrong way?

What would happen to the spin of molten Iron mass in the Earth?

Would it stop and what effect would that have on the Earth's magnetic field?

There is something else interesting about Venus, its surface and how this might relate to the flipping of the planet and its spin.

Could Venus have been another Earth that suffered a fate caused by the events we may yet to see?

Do a little research and you'll find something both interesting and disturbing.