Selectmen Robert W. Kimball Jr. and Robert S. Salvo Sr. retained their seats on the Norton Board of Selectmen Tuesday, besting George W. Gillis in a three-way race for two seats, according to unofficial results from the town clerk’s office. Initial tallies were 1,388 for Kimball, 1,142 for Salvo, and 574 for Gillis. Unofficial results also showed these winners: Theresa Kelly for Board of Assessors; Ralph W. Stefanelli and Robert S. Salvo Sr. for Housing Authority; and Chuck Moitoza for Water and Sewer Commission. Taking three Planning Board seats were George F. Burgess, David J. Miller, and write-in Ed Beatty. And for School Committee, Andrew Mackie and Valerie A. Desmond beat two other candidates for two seats.