Yeah, hard to see the height difference in the picture. Bob and I talked about this yesterday and it did sound like one of the blocks was different from the other though, with respect to the axle height. Would be interesting to see them in person.
It is weird that they didn't position the "hex" the same on the left and right sides.... I checked a new packaged yesterday and the hexes are consistent to this picture, with the left and right slightly different. Obviously that little detail won't affect anything important though.
Blake