Separate jobs are sent when you print or fax multiple copies in Excel

Printing multiple copies of Excel Documents causes multiple print jobs
When you print multiple copies of an Excel document, Microsoft Excel creates separate print job for each copy, and then sends the jobs to the printer. So if you print 5 copies of an Excel workbook, five identical print jobs are created and sent to the printer. This behaviour is different to that of other Microsoft and Windows applications.

Workaround
??The Microsoft article below states that you can stop Excel submitting multiple jobs by deselecting the "Collate" checkbox when you print.
More Information
You can read more information about this issue at Microsoft Knowledge base Article.