Or the bulk oil in the tank truck was a different product with Rotella paperwork, or a dirty tank truck, or some other local problem.
I got an order of a specially blended Chevron turbine oil in drums one time. It was the right label on the drums, right paperwork, and looked and smelled like the right oil. A couple of days later a Chevron rep came by, told us that it was the wrong stuff, took all the oil we'd mixed in our storage tank, and gave us a complete replacement with the right stuff. In that case it was Chevron's fault, and replacing the oil cost them much less than mechanical failure would cost. If there was really something wrong with that bulk shipment of Rotella, the reason needs to be found.
Ken