Here is the response I got from comments@ragincajuns.com
Thanks for the feeback. It helps us better ourselves and better service the needs of our loyal fans. Here's how the process for the media guide works:
The players in the media guide who are no longer on the team are in there because the guide was sent to the press on July 5. Those players were either still on the team when the guide was printed or the coaching staff was hoping said player would be on the team.
As for players not in the media guide, when the guide was printed they were not part of the team and possibly walked on or joined the team prior to fall practice beginning. Unfortunately with the early deadlines for printing the media guide it will never be totally accurate. We cannot control player personnel decisions.
An update on the Internet roster: We will be typing an official dress roster for the Northwestern State game before the end of this week and placing it on the Internet. The reason you haven't seen one yet is because the roster is constantly changing (players switching jersey numbers) and some haven't been given a game jersey yet. Once the roster is finalized we will be placing it on the 'net and each game week updating it for the particular week's game.