mirror upside down?

Sorry I am getting confused.
Select object shift+D then S ( scale) X (x-axis) -1 (for mirror)
I see the mirror to the left but the object its upside down ?

How is this possible?
Blender 2.56

The objects was an eyeball
Solved have made a new eyeball.
Select the eyeball object mode) shift+D then S ( scale) X (x-axis) -1 (for mirror)