Yeah, sorry, got it now. Perhaps the way it is written as 8 or 9 being a hit from Cannon at close range, made me think he was talking about Cannons! More fool me, that I didn't notice the sentence underneath where it talks about EVERY other sort of missile weapon...
Why not just say "8 or 9 is counted as a fall-back except for cannon within 8" when it is a hit"?
...Maybe up near where it says 10 is a hit?
Sour grapes over, looks like my question has been answered. Many Thanks Gentlemen!