I originally used the dot just over the keyway. I had used that dot at first and couldn't get the cam degreed. I called Mancini and they said that the crank keyway should be located at the one-o'clock position and to look for the other dot.
Great info thanks, I can certainly see how it would be confusing. I'll find out if my machine shop did the same thing but instead of calling Mancini like you did they just ordered a chain they were familiar with.