In Microsoft Excel, when you print more than one worksheet in a workbook, only the first worksheet is printed duplex (on both sides of a sheet of paper).
If you enable the duplex option in the Printer Properties dialog box while the workbook that you are printing is currently open, the duplex option is applied only to the active worksheet.
To apply the duplex option to all worksheets in your workbook, follow these steps: When you print your workbook, all worksheets are printed with the duplex option.
1. Open your workbook.
2. Follow the following instructions based upon In Microsoft Excel 2003 and prior
On the File menu, point to Print, and then click Properties.
In Microsoft Office Excel 2007 and Excel 2010
Click the Microsoft Office Button/File, point to Print, click Print, and then click Properties.
3. On the Layout tab, select the one of the duplex options, and then click OK.
4. Click OK in the Print dialog box.
5. Repeat these steps for every sheet in the workbook.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.