Word 2010's built in PDF generator is a bit messed up. It's just not reliable for getting fonts to work right. I recommend using another system that will use the print system to generate a PDF or use Acrobat to convert.

Raaaaaaaaaaage!

Most old font numbers were not based on existing fonts - they were custom designed just for house numbers. You might find something with a similar flavor from Jeff Levine (Jeff's Fonts)