Hey CJ,
No, you are correct, the elongated pulley is most definitely a second crank point....I had a close inspection after your post. Probably not a standard thing (where's DeeJay when you need him....heheh) but I think I'll keep it set up that way. The engine being off-set is due to the pulley on the driveshaft being installed around the opposite way to the ones on my other machine and also Shedpest's. Not sure why this has occurred but it's a pretty simple fix-up to turn it around and thus allow the engine mounting plate to go back into it's original holes and set the engine properly square again.
Cheers,
Craig