this has become a common question.
There isn't really a good way to do this.
I have thought to make the paper a custom length (2x long) but I don't think that this will work, as CR will probably only send 1 page to the printer. The other thought would be to code the report to skip pages, but I am not sure how to go about this.
my current idea (haven't actually done this) would be to keep track of whether something is a front or a back, and conditionally suppress this, probably with page break after the band. You would need to keep track of the page number as well...but you already want to do that (it would have to be variable as CR will count the back as a page as well)
HTH