In the two (2) indices of instruments relating to personal property, the register shall likewise enter and keep alphabetically the names of the grantors or persons, firms, or corporations executing or making the contracts or instruments recorded in the direct index, and the name of the persons, firms, or corporations to whom the conveyances or grants are made, in alphabetical order, in the reverse index, followed by the other entries as above required in regard to instruments relating to real estate. Instruments relating to both realty and personalty shall be indexed in each of the above named sets of indices and as above required.