theres 17 NPCs on my sertver i want selling specific items, but we cant make more categories?

theres 15 default ones but, it doesnt let us add more?

You can add custom ones/more just customize them. 

  "Shop - Shop Categories": {
    "Commands": {
      "DisplayName": "Commands",
      "DisplayNameColor": null,
      "Description": "You currently have {0} coins to spend in the commands shop",
      "DescriptionColor": null,
      "Permission": "",
      "Currency": "",
      "CustomCurrencyNames": "",
      "CustomCurrencyIDs": 0,
      "CustomCurrencySkinIDs": 0,
      "EnabledCategory": false,
      "EnableNPC": true,
      "NPCId": "00293",
      "Items": [
        "Minicopter",
        "Sedan",
        "Airdrop Call",
          "test2",
      ]
    },
    "Example": {
      "DisplayName": "Example",
      "DisplayNameColor": null,
      "Description": "You currently have {0} coins to spend in the Example shop",
      "DescriptionColor": null,
      "Permission": "",
      "Currency": "",
      "CustomCurrencyNames": "",
      "CustomCurrencyIDs": 0,
      "CustomCurrencySkinIDs": 0,
      "EnabledCategory": false,
      "EnableNPC": true,
      "NPCId": "29931",
      "Items": [
        "Minicopter",
        "Sedan",
        "Airdrop Call",
          "test2",
      ]
    }
}

OMG thank you! !!

i tried to spend about 6 hours trying to figure it out before i complained.

thank you for helping and for your amazingly fast response and amazing help