Chris, I assume you purged your bottles with the gun? It's possible that the guy picked up on some legit oxidation, but I've been dinged on oxidation a time or two when I was convinced that the judge saw the non-standard fill level from the gun and convinced himself that "Ok, he keg filled so there must be oxidation present "(where I found none). The former is probably more likely but the latter isn't impossible. Regardless, take the comments as a learning experience. You'll score better next time.