Is it possible to create multiple sales orders with the same SKUs on each one?

Hello, 

Yes, you can import multiple orders with the same inventory items. List the orders one after another in your excel, each one with a different order number. 
 

With automatic numbering on, Acumatica Import Scenarios use the order numbers in your Excel to identify where one order ends and the next begins. Each imported order takes on the next sequential order number from the SOOrder Numbering Sequence during import, when using automatic numbering.

Laura