I dont know if my permission system is working.  I am trying to use some mods that change spawn in inventory, and building.  When I do oxide.show user (default user) it shows me the permissions they have and they have the correct permissions and it shows them in "default" group, but the mods arent working for non-admin players...

Make sure default group has permissions: o.show group default. Also ask your plugin author, maybe it needs something else.