Grunt, What I have to do with these "baskets" is start out with 2 sets of 2, 60" long and make a cross at the center and start weaving (kinda hard to explain) them together. After a few rounds split then and add a 30" piece in from the center. As I weave I add more ribs. I think these have 15 total(4, 60" and 11, 30"). I taper that end of the 30" ribs.
To answer your question, Yes, I add an odd rib. What is the Indian style?