Great question.
There is a Catholic Church in New York. There is a Catholic Church in Boston. There is a Catholic Church in San Diego. And on and on. Many Churches. One Church.
All these Churches are one. One Body. One spirit.
There is no question on what the meaning of what the meaning of the word 'is' is.
That doesn’t work FatherofFive. Each was a separate entity with a separate “candlestick”. No ties to any of the others. Jesus didn’t address one entity and tell that entity to correct it’s subordinates.