Why doesn't it make sense? Some souls are either becoming enlightened or they stay in the astral realm long enough to allow organization. The universe is more massive then we can comprehend and is organized by different stages in planetary evolution.
The closer the galaxy is to the enlightening center of the cosmos the higher evolved and closer everyone is to being enlightened on that planet. The further away the more dark it is. That is why we see dinosaur fossils, because that was the age when our planet was furthest from enlightenment and had more less advanced, carnivorous, unintelligent and canibalistic animals. If you look at our galaxy from a far through satellites we are in an ascending trend towards then center and are just past halfway. In time our planet will be close enough to enter in a new age where telepathy and ideas we never thought possible will be possible. We are in the atomic age where electricity and space annihilators are becoming more prominent. Sorry for going on a tangent but I'm just explaining that the whole universe works in a cycle of soul evolution for everyone involved. Souls graduate from the physical existance once they realize that God is the soul reality that emanates the physical sphere.
I think on a cosmic scale, the position of the earth during the time of the dinosaurs vs. the position of the earth now is so minuscule that you probably wouldn't see it if you stood outside the galaxy watching the whole time.
I make this estimate based on this: the Andromeda galaxy is about 2.2 million light years away(so light could go back and forth 14 times between us two in the time it took for us to get to this point after the K-T event), and it will be about 3 billion years to collide with us. The earth is about 4.6 billion years old.
Therefore, I don't think the position of the galaxy relative to the center of the universe between then and now has anything to do with the evolution of biological life on earth.
EDIT: Besides, the universe is expanding right now, not contracting. That means all things in the universe are actually moving away from each other(and thus the center of the universe), except those objects caught in each others' gravitational pulls (like us and andromeda).
EDIT2: Now, if you wanted to ascribe some sort of cosmic significance to this position in the Milky Way, you might have something because dinosaurs were just starting to appear the last time the earth was at this position.
