The Difference Between Phantom Centere and Centere Speakers

In atmos you have the listener position, and that's when it's coming out of all of the speakers at equal level. The difference between phantom centere and an actual center speaker is gigantic,. They don't sound anything like each other. And i've got these weird multi mono reverbs, so i can kind of pin point where the reverb is be  and it may have nothing to do with where the source is. Iu can start building these relationships. F like front right to back left, which is totally different from front right to Back Right. It's mind boggling. You can defititely go down the rabbit hole. How do you see things in