Hi mycleanbnb-gmail,
Thank you for posting in the Community!
You may re-order your Invoice lines by clicking the Bento button (9 dots shaped like a square) next to the line number and dragging the line to your desired position. This action will re-order the Invoice line including the Product/Service, Description, Qty, Rate, GST, and Amount.
If you are only looking to re-order the Service date without affecting the Product/Service, Description, Qty, Rate, etc., the only way is to edit the Service Date manually by indicating the correct date.
I hope this is helpful.
Best,
John Enrico