You're probably out of luck with 2 boxes and 1 DVR. I have 2 DVR's and still see the kids stuff on the Scheduled shows. Cox attached a inline filter, but the Tech said..."never had anyone ask for 2 DVR and independent records like the old DVR." Can you believe that. How many of you out there had/have 2 old DVR that record totally independently and don't share anything...and actually WANT this setup. Here is my link, that had no responses, so I guess everyone is happy with what they have.....a shared TV system, whether you have 1 DVR and multiple boxes, or multiple DVR (Contour2, 2max channel record). https://forums.cox.com/forum_home/tv_forum/f/tv-forum/23329/i-have-2-separate-contour-2-boxes-but-cannot-independently-schedule-different-shows-for-recording-the-scheduled-shows-appear-on-both-boxes-and-eventually-get-recorded
Maybe someone out there has a solution.....I'll be waiting.