NO, stupid, I'm pointing out that he has had hearing issues related to his service in the Field Artillery.
Except he was never "demoted".
His pay grade was E-8
His rank was Master Sergeant
His posting was Command Sergeant Major (Normally held by an E-9)
You can serve in a position up to two grades below the required rank for a position. For instance, I was a Supply NCO with my unit, normally an E-6 posting, but I got the job when I was an E-4 and then and E-5 before finally getting promoted to E-6.
Normally, you have to complete the Sergeant Major's Academy to get the rank of E-9, but you can serve in a position with a lower rank.