Pearl Thorne gets promoted to Command Sergeant Major and asks Rick for a salute. You don't salute an NCO. You only salute commissioned officers.
This is not the US military, this is the CRM, it is not established who deserves salutes and who doesn't.
The Major General says 'Sergeant Majors' to Rick and his partner. The correct way to address them is, 'SERGEANTS MAJOR'. There are two sergeants, NOT 2 majors.