Hi Brys - I've struggled with this one too - I can't make out the instructions regarding the 'top' part of the wave - ie. which bead to come out of to start the next part of the wave. However, I think that all the beads are size 11 - either Delicas (3 shades of purple) or round seed beads (the cream ones) plus some size 15 round seed beads used to finish the bezels around the pearls.
As regards any corrections - to find them, all you need to do (if there are any!) is to click on the MAGAZINES tab in the blue header at the top of the page, then on the BEADWORK magazine picture. This will open a new window, which has a CORRECTIONS tab on a menu on the left hand side of the page (if that makes sense?) ... but I don't think there are any corrections posted for this particular piece.
Now, if any one has made this piece and would like to share their know-how .....
Regards, Keith