I looked your station manual up on the web and on PAGE 3 it tells you how to set the clock up. Are you getting an strong enough signal to update it. WWV is at times weak due to atomspherics. Try setting the clock to your time zone first then turn the atomic clock on and see what it dos after couple days of operation at manual mode
Unfortunetly I have tried, set to correct local time, but the next day it read the atomic clock and went back to pacific time when it received a good signal. I believe I can set it, turn the atomic clock off, but that defeats the purpose and won't be accurate after a while.