Nothing contained in sections 454.465 to 454.510 shall deprive courts of competent jurisdiction from determining the support duty of a parent against whom an order is entered by the director pursuant to the authority created by sections 454.460 to 454.505. Such a determination by the court shall supersede the director's order as to support payments due subsequent to the entry of the order by the court, but shall not affect any support arrearage which may have accrued under the director's order. The director's order shall be pleaded and received by the court as evidence of the extent of the parent's duty of support.
§ 454.501, RSMo