Hmm.....

It =looks= like the hair and dresses somehow get linked to a location out in the aether,  and the farther away the prop or hair is, the further it is rotated on the vertical axis. Do any of the distorted figures have a body handle? Another potential cause of this is manipulating them via the wrong set of dials. As most dresses are figures, you can manipulate them either from the 'body' designator, or the 'hip' designator. The problem being that you get into conflicting math that can result in gimbal lock, or adding a negative number to a negative and creating an undefined state. Check what the scaling was applied to, and see if that might be the issue.