Regarding the 2" of differential between the widths of the outer vs. inner layer on my quilt design.
The height of the baffles is 2". The way I make my inner layer, it hugs the hammock. So, all of the 2" height on the edges of the quilt must come from the outer layer. But, that extra 2" at each corner must be dealt with when it comes time to sew it all up.
I hopes this helps clear up some of the confusion.