MEGHAN Markle has had to make a lot of adjustments now she’s the Duchess of Sussex. From fashion, food to social media, it’s a lot to take on now she’s a member of The Firm. One faux pas she keeps seemingly making is all to do with her sitting style. Her sitting pose has come under fire before and it seems she’s made another mistake at the RAF ceremony at Westminster Abbey. Wearing a navy blue custom Dior gown with her signature boat neckline, she was spied in the hall sitting with her legs crossed at the knee, supposedly a no-no for royal ladies. As she took her seat next to Prince Harry she put her right leg over the left just before the service began. Etiquette expert William Hanson told MailOnline: “Although used to be the custom that ladies (royal or non royal) would never cross their legs, clearly the Duchess of Sussex is finding her own style and comfortable seating position by crossing her legs. “’Correctly, however, she is not letting there be too much of a gap between her ankles, which can look very ungainly when done by women or men.” For royal ladies, it seems there’s…