ClarisWorks may only print one copy of a document, even if you specify multiple copies in the Print dialog box. In the case of the Canon BJC600 driver version 2.0c, switching from color to black-and-white only printing allows you to print multiple copies. Microsoft Write, which ships with Windows, prints multiple copies fine.
Microsoft reports a similar problem with Excel 5.0 and the Hewlett Packard DeskJet 500C and 550C driver versions 3.0 and 3.1.