Making Box Packaging in Illustrator. Symbol are mirror image problem!

So i have a rectangular box on illustration. I have added 4/6 sides as symbols.

So for the front i added the correct symbol and it looks fine.

Then i added the same design as the front, on the back. But, it looks mirror image and no matter how i turn it still looks wrong.

How do i fix this?

I just want the image to look correct like the front side. I do not know why it appears mirror on the back of the rectangle. Looking for some advice.