Have you ever noticed?

The number placement on a phone and an adding machine are different on the top and bottom keys. Why is that? Why can't they be exactly the same?

I 10-key all day long, but touch of course, and I'm really pretty fast; I've been doing it every workday for 13 1/2 years. When I go to dial the phone, it's all upside down and I can't dial a phone number to save my life.

Someone should make them match so I won't be so confused.