On pattern piece B, is that meant to have 4 pleats? I understand piece C has the pleat that joins in the middle, but looking at the pattern, it appears you are saying there are 4 separate pleats in piece B followed with smaller pleats in piece C. If there are 4 each in “B”, how wide is the front of the pleat?
Please look at the sketch at top of page 3 of the instructions. Each pleat takes up 2” of space (on front), Piece C is given as a separate pattern only because it sometimes needs to be used differently at the corners. Piece C needs to attach to piece B to be the background of a set of 4 pleats at the middle of the side of the dust ruffle. Follow the arrows for the pleats. All pleats are the same size.

Can your pillow sham pattern have cord between the flange and pillow?
No, this pattern does not allow for that. However instructions for that and many other shams are in our Manual Collection.