X1 Guide and Stream show scheduled recordings I can't cancel

The X1 guide and the Stream app list of scheduled recordings include series and sports that I had set up last year to record new episodes on a specific channel number. These shows are now in reruns on different channels, most of which I don't subscribe to, but they're on the list of scheduled recordings and there seems to be no way of deleting the recordings. Is my DVR going to be filled by hours of blank space? How can I get them off the scheduled recording?