That is a lot of roosters for the amount of hens you have. That could potentially be a problem, causing your hens to be stressed out once your roosters figure out what mating is all about. Not to mention fights between the roosters. One way to alleviate this problem would be to separate all or at least two of the roosters. Your young ones are old enough to go in with the hens. There are going to be squabbles to establish pecking order, but if there are no serious injuries and blood isn't being drawn, I would let them work it out. It's the only way it's going to get better.