I would agree that is doesn't look like it has a normal flow and looks a little labored, but if authentic it would have been signed very late in life. That's a tough one to make a call on. For what it's worth, here is a similar signed PSA version which I have the same issues with.
http://www.sportsmemorabilia.com/spo...ce-psadna.html
The PSA appears to have better flow.