1. Font Size:
On one of them the font sizes are None, 1, 2, 3, etc, and on the other one they're None, 9, 10, 12, 14 etc.
I never used that dialog box because I was just working in code view, but I was curious so I checked into what you're seeing. I'm seeing it the second way you described. I don't know how to make it display other choices.
2. Page Properties:
When I right click in design view for Page Properties, on one computer I can choose which text will be default for everything on the page...
I can type in whatever I want in that dialog box, such as 100, then on the right select percent. I can also type it in code view.
On the other computer I cannot change it from the Page Properties dialog.
But you can still open code view, I hope? You can just type it there. If you are at all unsure of the exact code, check one of your other pages in code view, and copy/paste that snippet, then make any changes needed just to the specific number.