Bukkit Permissions: Owner group not giving me all permissions
Solution 1:
You might have made a mistake somewhere in the permission file. Are you sure that you are in the group – do you have the prefix/suffix from the group? If not, you might have added yourself to the wrong group or the wrong world.
Solution 2:
The node is '*' to give all permissions. If OP doesn't override the permissions and you want it to, then you should change that in the config.yml of groupmanager.
Solution 3:
GroupManager is outdated and you should use other permission manager. PermissionsEX is good variant.