That is somewhat correct , whatever permission you give the kit that permission must be also given to the players you want to use it, I have kits for ranked players based on hours , So i made a kit with the permission "kit.Elite" which would be for players with a certain rank (which is also a group) so i would type "/oxide.grant group <groupname> kit.Elite" and a confirmation message should come up, Just make sure that if you are making the kit for any group including vip that you have already created that group,