Some of the limbs, such as the arms and hands, are made to detach in order to dress and undress the dolls. I just had to put the hands back on my niece's Draculaura, which she's had for almost a year. She has repeatedly removed the limbs of her dolls, and none of the pieces have broken as of yet. I don't think the legs are supposed to come off, though, so that doll you had may have been defective.
The ball at the end of the arms broke off and stayed in the doll. She is always taking their clothes off! Found Abby last night and told her do not undress this one!!!LOL