Quantum DVR guide won't go below channel 466

It doesn't happen all the time and is random. I have the guide set to NOT auto redirect from standard channel to HD (I sometimes record older movies in standard to save DVR space). I can enter a channel under 466 and it will go there, but if I bring up any channel guide it only goes as far down the channel list as 466. Same thing if I bring up a guide and enter a channel number lower than 466. It's doing it right now but this morning it was normal. I have tried rebooting the router and the DVR but it doesn't make a difference. Here is a picture I took:
http://i.imgur.com/cM7RIOOh.jpg