Yeah, they are funny. At our home in Cincy, the wife had one feeder just above where I liked to sit on the deck, and the hummers would hover around me wanting me to leave, I wouldn't, and they finally would feed. I did see two of them apparently OK with each other, but there was a third they didn't like and would fight.
We only see one here, it may be the same one year after year for a bit, not sure.