I know what you are saying. But that's like saying a Buick is a Chevrolet. They may be owned by the same company, but they are not quite the same.
Technically, yes they are one company because Wells Fargo owns them. However, my bank still says Wachovia on the building and my account number has not changed (from what I understand I will be issued a Well Fargo account number someday). So, for all intents and purposes, they are still separate because they are not fully integrated into one entity. They are just eager to claim they are fully integrated so they can climb up higher on the top 10 list of biggest banks in America.