Do you hold your pen/pencil correctly?
$10 internet dollars says LSSpam is left handed. Just a shot in the dark.
ps Spam it sounds like someone rode you pretty hard on your pencil/pen grip.
Personally, I grip closer to the "incorrect" illustration and often cramp. Maybe I'll try to grip my pencil better (Lord that's awful):).
pss I may start a golf club grip thread in the future. Beware the claw....