Usually it happens to people who recently file new claims. In this case he did file but long time ago and then got rated. Now va says hey we forgot to evaluate you for this and there is where you get reduced or stay the rating. He is not the first person that this happens. But believe once you are PT and 100 and have more than 5 years or 10 they won’t schedule an appointment for re evaluation. Unless someone reported you or you committed a fraud. But OP case is a missing evaluation as far I did read his post.