Well to my aged eyes, the first pic it DOES seem to be off center to the left just a bit (if it was to the right it would be OK)hehe. But in the other pics it looks ok to me. I even put a pencil over the pic and it seemed to line up ok for me. I think maybe it is just an optical illusion because of the lighting.

Lay the spine down on a piece of paper and draw a line along and as close to the blade as you can. Then look at the lines you drew. Might help. Otherwise I don't think I would bother with it.