IIRC, a teacher of mine was a part time Mashgiach for OU. He mentioned that they have the ability to recall a product whenever they need to. I also remember him saying that OU takes a collateral to guarantee that if a company starts pulling funny business, OU has the ability to properly advertise the loss of Kashrut. The company he was talking about had a $70,000 collateral.
Also, I agree with Popa in regards to getting misled by the labeling. Nowadays, almost all flavors are fake that nothing is surprising anymore. We have sour cream flavored chips in Israel which are quite good that are pareve. If the ingredients said anything different I wouldn’t have noticed.
I guess what some posters are tayning is that OU doesn’t have so much ne’emonus in the first place; so it’s really Popa’s fault for not doing some lab research before eating.