My signal strength is normal today (it's always around 70) and 80% of the channels are not coming in at all and most that do are blocky and cutting out all the time. Anyone else seeing this? Talking to customer service they say our box might be defective. we've only been installed about 5 days so I'm not sure if this just happens sometime or what, it's been pretty good for the most part until now. There have been some problems when it was raining so I understand that but it's really clear out now..