I am sure it was just an oversight, though I see such things from automakers as well. Many times I have run into situations where a car that is clearly a 2002 model for example will have an drivetrain from a previous year. All stock must get used up at some point. I had the opposite when I bought my M80's , I bought V2's from the factory outlet so my woofer would match,yet I ended up with V3's but per axioms great customer service they fixed me up.
DOG is GOD spelled backwards.
I blame my terseness on my keyboard.