Core 17 introduced an issue where merchants who only ship to a single country causes customers to fill out both the Bill To and Ship To address fields at checkout. To resolve this issue make the following changes.

==========================================================
If the Shipping Address is set as the Primary address make these changes:

In your admin go to Pages>> ACAD>>Customer Fields tab.

Find: <mvt:item name="countries" param="BillCountry" />

Replace with:

<select name="Customer_BillCountry"><br /> <mvt:if expr="g.Customer_BillCountry NE 'US'"><br /> <option value="" selected><Select One></option><br /> <option value="US">United States</option> <mvt:else><br /> <option value=""><Select One></option><br /> <option value="US" selected>United States</option> </mvt:if> </select><br />
Make the same change on the ACED page.

For the OCST page use the following code:
<select name="BillCountry"><br /> <mvt:if expr="g.BillCountry NE 'US'"><br /> <option value="" selected><Select One></option><br /> <option value="US">United States</option> <mvt:else><br /> <option value=""><Select One></option><br /> <option value="US" selected>United States</option> </mvt:if> </select><br />
===============================================

If the Billing address is set as the Primary address make these changes:

In your admin go to Pages>> ACAD>>Customer Fields tab.

Find: <mvt:item name="countries" param="ShipCountry" />

Replace with:
<select name="Customer_ShipCountry"><br /> <mvt:if expr="g.Customer_ShipCountry NE 'US'"><br /> <option value="" selected><Select One></option><br /> <option value="US">United States</option> <mvt:else><br /> <option value=""><Select One></option><br /> <option value="US" selected>United States</option> </mvt:if> </select><br />
Make the same change on the ACED page.

For the OCST page use the following code:
<select name="ShipCountry"><br /> <mvt:if expr="g.ShipCountry NE 'US'"><br /> <option value="" selected><Select One></option><br /> <option value="US">United States</option> <mvt:else><br /> <option value=""><Select One></option><br /> <option value="US" selected>United States</option> </mvt:if> </select><br />

=====================================================

Please open a helpdesk ticket if you have any problems or questions.