I am trying to import invoices and associate them with open sales orders.  I have followed the instructions and imported the invoices successfully.  When I look at the invoices, they show the SO number that they are associated with.  When I click on the three dots, I am given an option to dissociate sales orders.  

However, when I look at the sales orders, they show show status confirmed, packed, and shipped, but not invoiced.  

How do I get the sales orders orders to show that they have been invoiced?