So up to now I have had no issues adding users into permissions. I went to add a user the other day, when I put in their username and it pulled from AD it disappears and says "Field can't be blank" when I press submit. I can't find anything online that can help on this error. Now I can add the users through SharePoint Designer with no issues. It leads me to think I am missing a feature through administration. I have tested this out on different machines and browsers to eliminate a plugin issue.
Any help would be greatly appreciated.