If I read right from your previous post one of the gliders was from a different home. If you didn't keep them separate for 30 days, do scent swapping, and then an introduction in a neutral location, then it's very possible they are having territorial issues.
After you separate them into different cages, you can go through the process and it might work, but it will take time. For now, for your glider's safety, you need to separate the ones who are balling up or they may get very seriously hurt.