I recently had an issue with only the default printer being mapped over from the local Windows 7 PC to the View Client session. It did not make any sense to me. I had 10 printers mapped yet only 1 was showing up. It turns out its a limitation of Windows 7. If all the printers are using the same Driver and Port then you will only see the default printer under the Devices and Printers page. If you right click that printer it will list all the printers you have mapped. When you try to print something it will also list all your printers.