That was an interesting comment you made about group dynamics, it isn't something that I have put much thought into before.
Her objection is solely time in rank, my objection is that on its own, time in rank isn't a valid objection. She is the only individual at the club that seems to believe there is an issue with the individual having been allowed to test. All of the other instructors, most of which have been doing the art for longer than she has, do not see a problem. However, because she is the manager, she is choosing to make it an issue. As a result, I am no longer volunteering my time at her location, it just stresses me out too much.