It may look 'off' when you knit it but actually the distance from the underarm to the shoulder shaping is probably the same number of rows since on the first shoulder you BO a row 'before' you do on the second shoulder, same as at the underarm. Anyway we're talking a row here which is about what - 1/6 or 1/7 of an inch. Not noticeable at all. It would be in crochet because the rows are taller.
sue- knitting heretic