Wow, you have Lots of shows. Maybe your 90% was the cause, although I doubt the system would have reduced you down to 48%. Hopefully COX can have an explanation. I sort of doubt that you will be able to recover...although I've been wrong before.
So, you have 2 DVRs, rather than a Host and client? I have 2 independent 2 max record Contour2's. I've tired to get users who have this config to respond to an issue I have...that is being able to specifically record to one or the other, or have the ability to view contents stored on one machine from the other without a physical change in viewing location. I cannot control which machine records what show, even if the recording is initiated from one. Since there is a max of 2 records, I can see rollover to the other box for that situation, but only that. It works less often when doing a series record.