Just don't understand how people get pictures where there are lots of them all at one feeder.
I read, somewhere, that hummingbirds will stop defending a feeder or patch of flowers when the energy cost of defending outweighs the benefit they would get from the nectar source. Along those lines, I went to a hummingbird festival in Western Kentucky (Land Between the Lakes, since you may be close enough to know about it), where during peak migration (early August, for them), they can regularly see 200 hummingbirds in a day. The hummingbird expert there said there are just too many hummingbirds for any one bird to attempt to defend a feeder, so while they do spar with each other and engage in some chases, they seem to generally get the futility of the effort and will share feeders.
On the rare occasions when I've seen two birds land on my single feeder...it's more like a game of chicken...they stare at each other, and then it's just a matter of time to see which one will launch to chase the other first. The only way I would ever get a picture of two birds on my feeder is if I'd been standing there with the camera poised and ready...possible, but unlikely.