Wooden Planks have backwards texture

Either wooden planks or the stairs and slabs have their bottom texture reversed--the lines that separate the apparent 4 planks don't line up.

To duplicate, place a wood plank of any color (tested it with oak and dark oak, assumed to effect all planks) DIRECTLY in-between a stair and slab of the same color, then destroy the blocks underneath and look at the texture.

Two pictures are provided to save the trouble.