No, I'm printing from Qimage. The issue isn't there except when I try to reprint a job using either the Embedded Web Server or the front panel. If I try to change the number from 2 to 1, it just flicks straight back. I'm guessing it's a firmware issue, and the only workaround I know is to quickly cancel the job before the second print gets underway.
There is something odd in the Z´s printer data stream in general. If the connection between the printer and the application you print from has been broken in time, say a power down and up of the computer system or printer then while reprinting saved print data -Windows spooler in my case- odd changes like smaller prints than orignally made appear. Has been the case since the first Z3100 firmware. I think not all data that goes to the printer is kept in the printer data saved and the printer falls back to some defaults then to fill in the void.
met vriendelijke groeten, Ernst Dinkla
Dinkla Gallery Canvas Wrap Actions for Photoshop
http://www.pigment-print.com/dinklacanvaswraps/index.html