Can't select printer

This is a weird problem.

I've seen this now at work and at home on differently setup and connected systems.

1. I open Excel
2. Go to backstage
3. Go to Print
4. Then from the Printer dropdown I select a different printer.

...

It won't work.  It will not allow me to select a different printer?  Even though I have 10 listed, I can only select the default printer?

Am I doing something wrong? Is there a fix for this?

Thanks,

Terry