Importing Sales Orders, SalesPerson is changing for Customer Maintenance

When importing Sales Orders using VI, the Salesperson for a customer in customer maintenance is being changed.  Customer SalesPerson before import is 01-HO03  and after importing an order for them it is being changed to 01-HO01.  The Sales Order for the first import has the Salesperson as 01-HO03. Then then it is changed in Customer and importing the same SO it then has a SalesPerson code of 01-HO01.  

Not really sure how or why that is happening since Salesperson is not even a field that is imported.