I think in acknowledging that this was a Sam's Club contest you answered your own question.
Judges (certified KCBS, of course) are accepted based on who signs up first. No attention is paid to their experience.
We had a similar experience with a nutty judge at a Sam's Club event. After questioning the rep, who was not a regular in the region, we were told "sorry...I questioned the judge but can't require him to fill out a comment card".
Take it for what it's worth and move one. Don't beat yourself up.