Pom Saturday precedes Palm Sunday this year as CBS airs the National Cheerleading Association Championships from Daytona Beach (2 p.m., tape delay). Commentators Tim Brando and Ed Cunningham will be joined by 1996 Olympic gymnast Amanda Borden.... The Kentucky Derby doesn't come on the air during the backstretch, nor does the Indianapolis 500 begin its telecast at mile 250. So how come the Masters starts its broadcasts no earlier than 3:30 p.m. (on Saturday), when the leaders usually are several holes into their round? Perhaps wall-to-wall coverage of other majors has spoiled us, but it's high time the masters of Augusta National let us look in a couple of hours earlier.