Can you share a photo of the roosting bars they have now, and also the rafters they are using?
Mine were doing the same thing.....trying to fly up from their roost bars to the top plate on the back wall, and would crash and burn in the process. So I raised the roost bars a foot to put their heads about even with the plate and all that stopped.
Basically, consider this......actions speak louder than words, and since they can't talk, all you can do is take what they are doing as their way of telling you they don't like what you gave them and they want something else.
The classic example is birds that will abandon and refuse to use a dinky little death trap coop that looks good to us, but not to them. Instead, they will use the adjacent kid's play set, roosting up in the high fort, even on the roof of it. Its not even a coop and we don't want them up there, but that is where they want to be just the same. To fight with them over that is like pushing a soft rope uphill. Better to realize and then mimic what they are trying to use and all will be happier for it.