This seems to happen most frequently if you use auto-complete to fill out the form information on checkout.   However, it also happens sometimes if you don’t put your address in until the last screen.  Somehow the plugin that handles the card info gets confused.

To fix:

Close your browser and come back to the page.   The shopping cart should be saved and you won’t have to add everything again.   https://wine.deerfootfarm.com/cart/

Sometimes the auto-complete works fine the second time… although I would recommend just adding it manually.  Sorry, we are looking at ways to fix this better.