Welcome!
I'm a little unclear on which index scores were what. It sounds like her WMI was very high, but her VCI, VSI, and FRI weren't quite as high. That does make a bit of a difference, as WMI is usually more of an indication of cognitive efficiency for rote and previously-learned tasks than of thinking and problem-solving for novel skills and concepts. (Though it's also associated with mathematical giftedness.)
On the more important question of her placement: if she is loved, happy, learning, and growing as a whole person, in all the ways that are important to her and to your family, then there is no need for you to feel guilty about your parenting decisions. No one else knows her or loves her like you do, nor do they have responsibility for her upbringing.
I think you'll find that schooling decisions are best made on a year-to-year basis, as children (and especially these children) and their needs change so quickly.
