time relative to...

No, every place IS the center of the expansion. That's literally what is happening. The "baking bread" analogy was just to help you visualize it in a 3 dimensional way, but the answer I gave is accurate.

Try to let go of your preconceived notions and visualize it in a new way. Once you see it, it'll feel more comfortable to you and you'll quickly realize it makes perfect sense.

I think it makes more sense to say every place may be A Center, not The Center

Ok. Then it's more accurate to say every place is A Center, not The Center. (just leave the "may be" out, because there's no "may be" about it).

Or you could say, no place is the center. The idea of "center" really has no meaning in this topology.

deal!!