Ply wood has 2 sides, we will always cut 1 side up, 2 side may have black marks from cutting which can be sanded out, 2 side is still ok to use, but may require additional sanding if using for double sided signs.
No two boards are identical. You will not get the exact board shown in the picture. Your unique board will heavily resemble the board in the picture but may have slight differences due to the beautiful wood grain patterns, knots, unique wood features, lighting etc. All of this just means your board will truly be one of a kind.