This illustrates your ignorace of BBT. We don't see this at all. We see expansion in Every direction as if we were spots drawn on a balloon and it's being blown up. It's expanding in more than 3 dimentions. Once more incorrect, the BBT was named by an opponent who disliked it compared to the now, quite defunct steady state theory. The BB is a rapid expansion, the dimentions of space and time are along for the ride. True but irrelevant.