Sec. 10. (a) A court in which a petition is filed shall order the proceedings transferred to the court having jurisdiction under section 9 of this chapter if:
(1) the petition was filed in the wrong court by mistake; or
(2) the petition is amended so that another county has more land in the proposed district.
(b) The court that establishes a district retains jurisdiction over the district regardless of a change in area of the district that results from later proceedings.