Apy and milhouse are correct, and i agree that it is not right to badmouth the OU over this. The creamers say non dairy and the OU labeled it OUD! Do you always use store labels to determine kashrus?
And to whomever said they have plenty non dairy products in their fridge that say non dairy….cmon! Are you just playing or are you missing the point? Coffee creamer/whitener is generally milk or cream. That is why it advertises as non dairy. The same way fake meat is advertised as meatless.
I know people have gripes with the OU and I don’t know if they are legitimate grioes or not, but this one sounds like an uneducated consumer issue and it may be wrong to aim it at the OU.