I was told the rotors and hubs were one piece?

Hello, I'm Danny.

No, to answer your question the front brake pads and rotors are separate from each other. Here is a tutorial showing what is involved on how to change front brake pads and brake rotors:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

I've attached picture steps below on how to change the front brake pads and rotors on your car. Hope this helps and thanks for using 2CarPros.