Scout and Rivals simply have not had time to evaluate everyone. It's actually just that simple. Look at Sammie Coates this weekend as an example. It took Chad Simmons one (and his first) to have Scott Kennedy at Scout bump him from a two to a three, and calls it a good chance he'll be a four.
I think people need to relax with the stars for short term. As these kids start to get more and more well known and take the stage their senior years, stars are going to start shifting all over the place.
JMO...