putting together, I joined the last row of squares to the wrong end. I didn't notice until after I'd done the edging that the squares are not in the centre at all. I don't want to re-do all that, so I'm going to say that centred is boring and predictible. I meant it to be like this all the time!
For those who don't want to follow the link, this is a group project blanket that will be given to a family whose son died. His name will be embroidered in the blank squares.