If you look at the all time list, you will see not Pandemic 2 on top with 580 points, but Best XXX Ever with 4407 points. The posts before that are in the thousands and stuff. Why? It's Paul and Darius' new update. They took all of the facebook likes and added 1 point to the posts that have facebook likes. 1 point for every 'like' your post gets from facebook. I hope that this clears up any confusion and cudos to Paul and Darius for making Sharenator a better place day by day.
Edit: The points gained on the post from Facebook does not count toward your total points.