Nothing in this act shall be deemed or construed to affect any litigation pending in the courts of the state of Missouri at the time of ratification of this act by congress concerning the title to any of the lands, sovereignty over which is relinguished by the state of Missouri to the state of Kansas, and any matter then in litigation concerning the title to the lands, sovereignty over which is relinquished by the state of Missouri to the state of Kansas, shall be continued in the courts of the state of Missouri until a final determination thereof, and such final determination shall be given full faith and credits by the courts of the state of Kansas.