the line items on the invoice have always re-ordered to the service date order on the PDF since I've been using QBO since 2015. Doesn't matter what you do to the lines on the screen. Doesn't matter if you make the service date the second column in the layout. QBO has so many failings and yet Intuit wants to get rid of all the desktop versions and have everyone go online. Well guess what - the online version DOES NOT WORK FOR EVERYONE AND THERE ARE WAY TOO MANY PROBLEMS WITH IT.