I read the manual and a few times and I'm still stumped. Why won't any of the MultiBand indicators stay lit on my GW-9000? I chose the city, manually got a signal, and now the watch is calibrated to Fort Collins. I shut off the automatic calibration because I want to time the watch for the first month. But with either automatic or manual calibration, the middle US band indicator won't stay lit. What am I doing wrong? Is the watch broken?