If an absentee voter marks and returns an absentee ballot for an election district other than the 1 of which the absentee voter is a resident and a duly registered elector, such ballot, because thereof, shall not be adjudged invalid, but, as indicated by the marking of the ballot by the voter, shall be counted as a vote for every candidate appearing thereon who is a candidate for an office to be duly voted for in the election district.