While I've never used a scope of any kind on a handgun, I am puzzled by the mounting of yours. I fully understand that the way it is mounted allows you to 'Easily' have vertical and horizontal adjustments.

I just don't understand 'why' some things are upside down/didn't the factory have thought this design all the way through?

See the area outlined in Red;

Name:  Handgun Scope.jpg
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Thanks in Advance for tolerating my ignorance. :