Issue with schedule

Hi Folks,

  I have one policy with two schedules. One is nornal schedule and other is with SLP override. Bothe schedules are set on same days and timings. Both are Full backup schedules. The first schedule(normal) retention is 1 month(disk) and second schedule(SLP based) retention is Backup 1 month(Disk) and duplication 1 year(tape). Now when the time meets only the first schedule is firing not the second schedule(SLP). Netbackup should  fire the schedule that has larg retention.But here its not happening. I want SLP schedule to be run when the schedules are overlapping.