Rob, as i had said in our iMessage thread, when acquiring that town tile i TAPPED on the top tile (showing carpet), but always ended getting the lower tile
i tried again and again (before tapping the checkmark), but no, d'oh.
but both tiles have exactly the same wording, both tiles explicitly mention to increase the Tunneling Range.
whatever, a) Dwarves can get only the lower tile and b) it does not work.
i have contacted the devs about that. i think @robthomasson is right when saying it's not meant for increasing Tunneling Range.
what a crazy mistake with wrong wording! btw exactly the same in the german rules.