coil balances breaking

That does not sound like it should be happening. The coil springs might be hanging up in the track as you slide the sash up and down. That would cause the kink. If you can, send some photos of your coil springs and we will try to help.

Having one coil on one side and two on the other doesn't sound right. That may be why you're running into issues. You need the same number of coil springs on each side of the sash and the same weight number printed on the coil springs. As it is now, you likely don't have equal weight support on each side, which means the weaker side won't be able to do its job properly.