Hey Joe,
Take a look at those fields again, they are listed under the ShipTo/BillTo Address. If you look in the field list you will find;
Shipaddresscity, Shipaddresscountry, Shipaddresszip, Shipaddressstate
As well as
Billaddresscity, Billaddresscountry,billaddressstate, billaddresszip
What you are reading on the screen is the caption set for these fields. When you remove a field from the screen, you no longer see the caption. The field would go back into the field list with its original name.
The possibility of adding another section into the edit wizard that displays the field name as seen by the table, is something we are looking into for future updates.