Products on orders are automatically ordered alphanumerically, this can be manually overridden within individual orders
In the Sales Order document, go to the Products tab and click on the [Rearrange] icon
Drag and drop the Products in the list to the required position.
Click [OK]
Or you can sort them alphabetically. Just click on the [AtoZ] icon
and confirm with the dialog box
Products are now in alphabetical order
Click [OK]
Reordering an order confirmation will NOT auto update in other existing related documents.