Contour 1 DVR

Made two posts today regarding recording shows in progress and removing Missed Recordings. I was able to record an in progress show by pushing the red "Rec" button while the show is in full picture - not from the Guide. But should I also be able to bring up the Program Guide, find that show in progress, highlight that show and then press the red "Rec" button? Tried that twice and it was sent to Missed Recordings "due to a technical error". Operator manual online seems to say I should be able to do that.

Operator manual gives no instructions on how to delete Missed Recordings list. No need to keep those listings in the middle section after i've reviewed what/why was missed. How to delete them when I'm done?