All execution sales of real estate heretofore had in which the execution officer has failed to serve notice upon the titleholders in possession to select their homestead or has defectively served such notice or, having served such notice, has, upon the failure of defendants to select a homestead, neglected to plat the same or has defectively platted the same, or where said execution officer in such sales has offered the property en masse without first offering the same in the least legal subdivisions, or where said officer has failed to offer property, including the homestead, first separately in least legal subdivisions exclusive of homestead, then offering all property en masse, exclusive of the homestead, then offering the homestead separately, then offering all of the property for sale, en masse, be and the same are hereby legalized and declared to be legal and valid in all particulars as if all of the provisions of the law had been in all respects strictly and fully complied with at the time of said acts or said sales.