Hoppers do not push to connected hoppers, they only work in sets, e.g. hopper+chest, hopper+dispenser. A hopper+hopper+anything chain does not work, which is not expected behavior, tested on sp and chained hoppers work fine. I don't really have any ideas, maybe citadel or something.

ya thats a quick fix for security

hoppers cant take anything out of another container right now, to prevent theft

i ill have to come up with a strategy for making them more usable and still secure

I don't know how well this would work with how all the plugins are made, but logically I could see how only allowing hoppers to pull out of other containers with the same citadel group protection would work.