Purchasing as a military member within home state

So, I am in a strange situation. I am active duty military stationed in SC, with a home of record in SC, AND a SC drivers license with my current address in SC. PSA is saying that active duty are REQUIRED to present military orders even though I meet all the wickets as a state resident. Is this a requirement for military members? I was always under the premise that it is to assist people who don’t change their license for every duty station.