if its conforming hair it makes sense that it would do that since her head is turned.
try evening out the head turn by adjusting both the head and neck twist dials, not just one or the other.
is there an hr2 version (prop) of the hair you can use in this instance?
there are drawbacks to both HR2 and CR2 hair: HR2 doesnt create issues like this but often has pokethrough when you move the head. CR2 hair follows the body poses but results in issues like this.

welcome to poser - every fix consequently breaks something else. at this stage of the game the program is nothing but workarounds and compromises.