I note that your screenshot shows "document properties". Is there a way to access "printer properties", or similar, so that you can set printer defaults? I don't have an HP9500 so cannot offer specific advice.
In your second screen shot, there should be an option that says output. Within that there will be a list of more options, look for one that says duplex or 2-sided print. Don't forget to apply the changes and then ok them.