Lesley, I think I am confusing you even more. The boders that will be short are 2 of the Pieced tri/Plain tri border. They make no allowance for the addition of the skinny border. No matter...it will work.
Today I got the narrow skinny outer sashing border sewn on and another tri border stitched together. Do ya'll think I should do the trapunto work PRIOR to sewing the border to the quilt or sew it to the quilt first???