I agree with with captainmike and dudemcnally. I doubt they were intentionally misleading you and more than likely misunderstood your question or don’t know the full details of the insulation of the grill. I manage a team that does client support too and there are many times where I have newer people answer a question incorrectly because they didn’t understand or thought they knew the answer. Obviously I don’t know the specifics of what happened here but I’ve seen it many times where the person answering a question didn’t fully comprehend the way it was asked, the terminology used, or the what the persons was really looking for.