
Were you thinking this was an error? It is a very (and I mean VERY) minor shift. Off center hurts the grade of a note and lowers the value (assuming it had any value to start with). In this instance it wouldn't hurt the grade too bad, less than the overall condition with all the wear and folds that is. That's assuming of course that it was collectible in some way, which it's not.
It isn't until the design is off the edge of a note that it becomes an error and no longer hurts the grade.