Having difficulty with items showing up in the new Airport DLC menu tab

[BadPeanut]

I am trying to make a new network that would be specifically used in Airport Areas, but I am having trouble getting it to show up in the right menu. While I can clone the existing networks in that menu so they retain the proper UIcategories and item classes, if I change the netAI with modtools, or else use modtools to create a network with the correct UIcategories but a different netAI they load into the game, but don't show in the menu.
Is there a limit for any reason that would stop this from working, and is there any way it can be worked around?
Looking for more clarity on what could be preventing this

Thanks!