MGR- Duplex job add blank backsides which are not intended.
The document page size varies a little between front and back, which cause the Output Manager to add unintended blank backs to pages.
Additional parameter in the Output Manager's input profile suppresses the blank backs.
This does not cause any adverse effects on the Simplex jobs as they come with modifier PDFIN_PLEX_DEFAULT=SIMPLEX.
UPDATED: June 19, 2017