CHARLOTTE - Warriors interim head coach Luke Walton was named the Western Conference Coach of the Month on Tuesday, an announcement from the NBA that would have seemed inevitable if it weren’t for the fact that Walton is officially 0-0. Sure, the Warriors are 19-0 - the best start in NBA history. [...] those victories are awarded to head coach Steve Kerr, who is on a leave of absence while recovering from two offseason back surgeries - one of which started a spinal fluid leak. The NBA clarified its rules, saying the head coach of record is credited with team wins and losses, but any team head coach, interim head coach or acting head coach is eligible to be recognized with league coaching awards. Kerr was quoted as saying the policy of not awarding interim coaches with wins and losses was “ridiculous,” but he said that was before he knew the history of the precedent. Once he learned why the rule was created - stories like Don Nelson, who would be dropped from the No.