I've got a reliable provider and have the box connected to the proper VM cable that my TiVo box was previously connected too, so signal is good. Nearly all channels are glitch free but there are some that are not, an example being one of the HD Sly channels. I've noticed the glitching only occurs on the channels that have 122MHz listed in the info part of the channel. The ones that don't glitch are on 500MHz and above. Is this a weak signal just for some specific channels or something else?