Decal Two Sided?

Hey hey!

I was busy adding decals to my tanks to let them look like the tanks I found in world war 2 pictures.
Here fore i'm using the "Two Sided" option to place one decal that it's placed on the opposite side as well,
but here occurs the problem, it doesn't always copy it to the other side and at some places it does.

So, does anybody also have this problem and do you know how I could fix this?
Thanks in advance! :)

Happy new year and the best wishes for everyone!
Naksatra

If the other side of the vheicle isnt exactly identical to the side u put the decal on it aint gonna work

Not correct shadow ..

I have put decals on my tank

bcakside of the turret is different then the front side stil the decal showed up on both sides bit weird looking on the front but it was still there