We have created a custom package where we are invoking aso_quote_pub.update_quote.
For shipment details when we pass the party_site_id and party_id it is automatically creating the account site uses for ship to, but we don't want.
Can some one help us on this. This is little bit urgent.
If it's urgent, then you can inactivate the site as soon as it gets created as a workaround.
Otherwise, I am not sure if this is possible or not.