I am preparing a structural frame made out of I beams and C channels.

Upon mirroring a portion of the frame, it is ending in wrong direction then intended.

The mirror feature preview shows correct orientation in "Partial preview", but once I click OK it takes opposite direction.

See images below....

Upon clicking OK....

Interestingly, when I see full preview, it shows exactly the same result as it is generating.

Why are two previews showing different results??

thanks in anticipation,

Snehal