I just purchased the new Arris XG1v3. I set several series recordings on a high definition channel, but, instead, it recorded the same show on the corresponding regular definition channel. It may have done this because the regular definition channel aired the show at an earlier time, but I'm not sure. In any event, there does not seem to be an option that specfies you only want to record the high definition channel. I'm sure it must be there. Can somebody help?