Once you have connected to NetSuite you will see two settings below your NetSuite credentials: Download Sales Orders or Item Fulfillments? and Download Trigger Status

Download Sales Orders or Item Fulfillments? -> Controls whether Shiptheory downloads Sales Orders or Item Fulfillments are pulled in from NetSuite. 

Download Trigger Status -> Controls when something is downloaded into Shiptheory. For example in the image above Shiptheory would only download Sales Orders with the status of Pending Fulfillment. 

IMPORTANT: It could take up to 2 minutes after your Sales Order/Item Fulfillment has been given the correct status for it to appear in Shiptheory.