Pixelated photos when converted to PDF

I have a 2 page flyer  one of the pages has photos slightly at an angle. When converted to PDF and printed the photos are printing pixelated.  Printing them as jpgs they are absolutely fine, so not sure what the problem is other than the angle and as of yet I haven't found a solution.  

To print a proof copy of course I need to print it back to back but can't find a way of doing that from cdr in jpg so I as a short term solution I have insert the 2 pages into MS Word so I can print back to back.

Has anyone any suggestion either as to why cdr doesn't like the pdf or how I can make a 2 page document in cdr so the jpgs will print back to back in one pass.