Glad it is working well for the op. I seem to get multiple broodies frequently. The way it will work out is different each time. Like mentioned above where chicks and moms are just one big group happens, but in my standard coop I am more likely to see something else. Some broodies don't let the other mom and chicks near them. Some will let the other chicks come along, but not the other mother, while a few don't seem to care what the other mother does, but will attack the other chicks.
I tend to let them work it out, but sometimes I need to make sure separate feeders and waters are offered untill weening even though they are all together in the coop.