Well that confirms it, ive been riding wrong all these years!!!!
ages ago in one of my lessons someone was rising on the "wrong" leg and instead of my RI just telling them to correct it she asked why they were doing it. that confused everyone and the person was really embarrassed. my RI then said that there are specific reasons you would rise on the "wrong" leg and non "BHS" ways and as she was teaching BHS she didn't tell us any more than that. i just thought that means there are people who teach you to sit on the insed