Purchased Moog K3161T ball joints and received bot...

Purchased Moog K3161T ball joints and received both. The problem was there is a new and old design. I received one of each. Wanting the new, improved design, I attempted to get a matching pair. After two emails with customer service, my ticket was closed out where there was no way to communicate.
Customer Service stated they were both designed to fit the vehicle. I attempted to explain that with the old design, the axle shaft needed to be removed to grease the ball joint where the new design located the zert in a different location. I again was told both were designed to fit. A steel wheel and an aluminum wheel will both fit, but I still would not put one of each on my Jeep.