In my experience, the image shift direction is always related to the orientation of your preview. What I do if I have to shift the image to align it correctly for duplex is "Print and Hold" the image so as to see the orientation of the image. Then, take the printed piece and see where you need to adjust. Orient your printed piece the same way it previews on screen and work your adjustments from that. You should be good to go!
Currently using CWS 126.96.36.199 on Windows 7 Ultimate x64 SP1.
Running 3 Ricoh machines:
Pro C900 - ProC900 v4.0 System 8 Release 2 (PLP Installed)
Pro 1107ex - EB-1357ex v1.1 System 8 Release 2
Aficio 3260 - E7000 v1.2 System 6e.