I came across this issue a couple of days ago. I started to download Caprica. After it started, it showed over 10 hours to download a 50 minute show. Tried to cancel and got the same you did. So I unplugged my home plug from internet. All that happened was it stopped the download then resumed after reconnect. Unless and until Dish can speed up this process, I probably won't use this feature, especially since we have Netflix and a Roku box. Guess you would have to try a reboot and see what it does.