NX Creating sketch curves results in duplicate mirror curves being created

Sketch curve created has mirror duplicate effect:

How to disable this behavior?

This is due to Mirror Display function being toggled ON. Use following steps to toggle off this function:

(1) In the command finder field, type in "Mirror Display", wait for short moment for NX to automatically populate the found command underneath:

Click to select the found command.

(2) Now take a look at these two different area where "Mirror Display" icon exists:

(3) Click on that icon to toggle OFF the Mirror Display function. Once toggle off, sketch curve created will not have that mirror display effect.