Waiter...my dressing is frothing!

I have been in and around food service business for more than 25 years. My dining companions have similar backgrounds; one even owns thirty-one restaurants. So when my blue cheese salad dressing is frothing and carbonated, I trust my judgment that it is fermented and therefore spoiled. Don't get me wrong, I love carbonated things....well really just beverages.

The salad was sent back, stating in no-uncertain terms that the dressing was spoiled. Deena, our waitress, took the salad back. She returned a few minutes later and assured us that all of their dressings are made fresh and therefore the salad dressing was good but she would be glad to replace the salad...with another kind of dressing if desired. She did not taste the dressing but assured us that the kitchen assured her that it is good. OOOOKAAAY. I'll have oil and vinegar. The salad was delivered and she explained again that the dressing was fresh and their blue cheese dressing is kind of tangy and that may have been what we were tasting. A short while later, another individual who appeared to be a manager stopped by and once again assured us that their blue cheese dressing is kind of tangy but it is fresh and good. REALLY? Even if we had dead palates and somehow did not know that carbonation is not normal in blue cheese dressing, one would think that the staff would not go out of its way to argue with us, repeatedly. This Mecca of food safety and customer service shall go unnamed since I am sharing this story with management in the hopes that they address it appropriately.