When using a double-sided version with a duplex compatible printer, if the pages are upside down after assembling, you may need to change a setting in the print dialogue box:
Select Print.
Select Double- or Two-Sided (look under Finishing or Layout).
Switch the Edging menu from either Left to Right, Short to Long or vice versa.
Run a test print of two pages only. If the current setting does not work, please try the reverse setting.
You may also need to update your printer driver. For the most recent copy, please visit the website for your printer manufacturer.