Oh hun your sight is fine. I had the dark beige from 17B where the flap on the right side of the bag was cut oddly and there seemed to be more material on that side of the bag. Of course I had some people imply that it will even out with wear but that's not possible because the chain attachment is fixed inside the bag and cannot even out the flap if it was made that way.
Also I have the same issue on my dark red again one side of the flap has more material but then it isn't even aligned properly so one side of the bag is exposed by 1/2 inch. Meaning that the flap doesn't cover the actual opening completely. I love the color and had given up at this point. All of my other minis are symmetrical.
But 17B Navy was made from a soft caviar almost as if it was lambskin with an imprint that resembled caviar but it is smooth to the touch and not raised like regular caviar. Oh well I have two 17B minis that I am satisfied with but not thrilled over.