Jim Warner was running NDScope against a number of channels including `H1:GRD-SEI_ENV_STATE_N`. Every channel except 1 PEM channel showed a time shift of about 30 minutes when switching from second trends to minute trends. Raw data did not match minute trends either. A restart of NDScope brought the data back in line. NDS was h1daqnds1. It seems unlikely NDS was serving data different than requested, so likely NDScope was requesting data from a different timespan than expected.