Well the T Shirt company with lots of humorous prints got the best of me as New Zealand does not even exist when I tried to place an order. Hopefully it's a joke for first time buyers? I'll see what their help line says.
Helpline response, we have two sites, you must use the US site to purchase from NZ. Of cause the US site changes railway to railroad and has has totally different designs. No response to my second query about this little difference.