Technically speaking, if it's not perfect, it's an error, and this clearly is not perfect. However, there are tolerance ranges for what is considered "normal". It is my opinion that this note would fall within the "normal" tolerance range (albeit close to the edge).
I wouldn't blink an eye over this note on the basis of the position of the serial number alone.
Logged
BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.