To cancel a series you are recording on your DVR: Go to menu, DVR List, series manager, then click the show series you want deleted, then cancel series.
Thanks for posting !
I must have a different interface (got my cable box 3 weeks ago)! When I hit the green List button, at the bottom I can select "Scheduled Recordings". Then I can choose "By Time" or "By Name". Regardless, once I get a list - say sorted by name - it has multiple entries for each episode of a series. Opening one of these items only lets me delete that specific scheduled recording, NOT the series at all. It is obviously not possible to delete a series that way.
Don't use the green "list" button. Click the blue "menu" button, go to "apps", go to "DVR", go to "series manager" and then cancel the series you have highlighted.