Why does my DVR delete my shows?

My dvr had recorded shows from weeks, ago, days ago, etc. and now they are all gone. I record shows and they save for sometimes twelve hours sometimes for 24 hours. My series settings have NOT changed. Contour deletes all my recorded shows randomly. I recorded the Bruins last night. It was there at 10pm, not there at 5:30 am.

My settings are set for "wait until I delete"

Any help?