I don't know about that, but I do know that you are wrong. 1) It tastes nothing like sour cream, so you don't even need to read the fine print. 2) You don't really think that Sello Rojo is going to sell their sour cream and label it as crema, do you? And expect people to look at the fine print? When most Mexicans don't even know what sour cream is?
Sello Rojo is crema, it's not sour cream. They're made in two different ways.