One caveat with double-side printing: make sure you print the bar codes (usually there are two pages) on a separate sheet. The reason for that is the document checklist CIT 0007 E which asks:
Place the barcode page on the top of your application (or if applying as a group/family, in each individual application package)
Depending on how lengthy your tables, your application may have odd or even number of pages. In case it is odd, you will have bar codes on the same page with you signature, and if you put the bar codes first, as asked, it will be a bit weird as you application seems unsigned. It also gives more chances to the CIC officer for misplacing the page with the signature, as I can guess they scan bar codes and then may dispose them.