To change the order in which the items on your order are presented, you'll want to navigate to Options > Edit Preferences, and choose the Printing Options tab.
To sort them in the order you entered them, from top to bottom, Ensure the As Entered options are checked, and uncheck the In Descending Order option.
To sort your items numerically, choose the Catalog No options, checking the In Descending Order option.
You are welcome to experiment with these options, but typically they work best when options are match on both sides (ex. As Entered and As Entered both selected).
Don't forget to click Save once you've selected your desired options!
NOTE: This does not retroactively alter orders previously entered. This will effect orders entered after these options have been changed and saved!