Me autorepondo para futuras consultas del hilo:
1. Este problema está solucionado a partir de la versión 10.04.
2. Para las versiones anteriores ()sacado de las news de reportbuilder:
Código Delphi
[-]Not all printers support generating multiple copies so by default,
ReportBuilder handles this process. If you would like to give your printer
driver control of printing copies of a report, you can set DelegateCopies to
True. This may also solve the issue you are having with duplexing an odd
number of pages with multiple copies if you printer driver is set up to
handle this situation.
If this does not work, take a look at the following example.
http://www.digital-metaphors.com/tip...plexCopies.zip