Because of the @ sign ? That and many things regarding Macs are quite odd. When I as a programmer has to google how to enter [ | and ~ I am about the throw the thing out of the window....
That and it is right beside cmd-tab. One fat finger away from force quitting whatever you’re working on. Thank god for auto-save. I’ve lost more work from fat fingering than should be reasonable.
Where they usually are right? Or look down at the keyboard if it's a different layout? Or did you setup a keyboard layout that doesn't match the physical keyboard?