Sec. 2. The general index of the record of an instrument described in section 1 of this chapter made:
(1) under law;
(2) in the handwriting of the county recorder; and
(3) at the date the general index was made in any county of the state;
is prima facie evidence of the proper execution and record of the deed or mortgage, as shown by the general index. However, this chapter shall not affect any litigation pending on March 6, 1883, in any of the courts of this state.