Are you using Emily Ocker's Circular Cast on?
a picture explanation of the technique.
Did you know there is an EZ group on Yahoo organized by Kelley Petkun, owner of Knitpicks? The group is following EZ's Knitter's Almanac and many of the members have made Pi Shawls. It would be a great place to ask questions about the shawl.
Check out the group on Kelley's blog
and click on the button to join the Yahoo group.
Hope this helps!