I can explain your question about the earth's velocity. It would indeed be quite unfortunate for us to be going well over the speed of light. We would have to reconstruct relativity from scratch. However, because the earth, the sun, the stars, and everything else has accelerated to this ungodly speed, what are we supposed to measure our velocity in relation to? There's no way of telling if the earth started at 0 m/s 100 years ago or 100,000,000 years ago, because we cannot see anything outside the reference frame of our universe.