That is the way of chickens and the younger just wait their turn in the pecking order at the feeder. They will work it out.
The only time I've ever provided two troughs was when the meaties were being raised with the layer flock....the younger, hungrier and more motivated meaties would swarm the feeder like bees and the older birds couldn't even peck their way into that mass. When I gave the meaties their own feeder and fed them first, the older layers finally could get a beak in edgewise to the feeder.
This I did out of just plain old fair dealings and respect for the older gals...they deserve to get to eat first as they were there first and are higher on the food chain than mere meaties, IMO.
Just put out enough feed that there is some left for the younger birds when the older birds move away....everyone has to learn their place in the flock and then fight for their rights. It's the way of the chicken world and is best left to the chickens, IME.