You said is SSunburn. The carfax on one of my cars (not the Viper) is completely wrong about a lot of items, showing multiple owners when I am the original owner.
I contacted them to have the matter resolved and they were completely unhelpful. Even offered to send them a copy of the new car bill of sale and they could care less.
The service is one of many items you should use, but relying on it as fact is a mistake.