It's true. I tried on several Pearl I. shorts too once in a store and they fit me really badly! Most Shebeest clothes fit me very nicely. So you and i must have body similarities.
Jen- for some great free shorts advice from really really experienced women riders- just phone the women at TE (click on the link at the top of this page "Click to Shop" for phone number). Those women have seen it all and know all their customers' various shapes and needs. TE has lots of plus size shorts and these gals know their business and will be happy to give you shorts advice. Call them!