The options I'm using:

Once clicking print, I end up with 4 "save as" dialogs. Same results with Microsoft's XPS printer.
Now that I'm thinking about it, I had a complication with PrintBoss at a client site a couple months ago that I'd now bet is related to this. When printing a large range of invoices through to PrintBoss, PB was missing a handful of the documents in it's workfile (essentially a log of everything that passes through).
Troubleshooting with PB support led to the realization that each invoice in the range was coming through as a separate print job. Luckily, we were able to adjust some of the PB print driver settings to accommodate and there hasn't been an issue since. I remember wondering at the time what had happened to cause this to pop up, but I bet that it was the first time a large range had been printed since upgrading to OE 8.1D.