Permissions Not Working Correctly

I've got a category of commands which is set to only be visible to players with a specific permission.

  "Prestige_Training": {
    "Image": null,
    "Permission": "skilltree.prestige1.use",
    "Sale": 0,
    "Items": [
      "command/spexchange1"
    ]
  },

Players with the permission can see the category and items but when they attempt to purchase the command they get the shop's error message stating they don't have the required permission. Is there somewhere else I need to set this? I couldn't see an option on the command itself.

Shop is registering own permissions for categories, in your case there should be one named "Shop.skilltree.prestige1.use". You should be able to check that by using "oxide.show perms" command or with Permission Manager plugin. 

Changed Status from Pending to Not a Bug