Helper and Moderator is not the same thing, there is a difference between them all.
Helper is just a moderator trail. which means, they are looking for people that need help in lobbies, discord, etc.
Moderators do punish people, looking for reports, doing bug reports, helping around in CubeCraft's discord and answering questions.
Admins can do a lot of different things, CubeCraft's current Admin is called AnimalTamer1 and she is the staff manager, she is dealing with the staff feedback, helper interview and a lot more.