Thanks for your input, I am on the verge of undoing the sewing and doing my own thing, am sure this lovely lady wouldn't mind. I think there is meant to be enough for 2 QS quilts, a finished lap size flimsy, and a small yo-yo quilt. Not totally sure what all has been used for the backing pieces, but there is also a 20 mtr roll of unbleached calico - for the backing, which I am not using, will replace that. The pieces include curtain and deco fabrics so it's a real hodge-podge.
I was mostly stumped over those sewn squares, but they won't take too much to unsew, will they? Oh I do love a challenge.