With UV5R selected as the radio, I downloaded to chirp from the radio in the channel mode. chirp said Loc 1 was 451.860000 Loc 2 was 462.725000. then reading the radio in frequency mode I saw ch-1 was 451.872 and ch-2 was 470.637

Could this be a step problem. Set the step to the lowest setting and the radio might leave them alone. If the step is too high, I think the radio either truncates or goes to the closest step.

Mike