It did extend the recording time of Elementary on Sunday night(10:30pm start) after the NFL game ran long. But I'm not sure the resume feature was set properly. When I selected the file for playback, the "Resume" function was listed but, after clicking it, the playback started from the beginning. Not sure why.
It seems that recording the NASCAR race(3:00pm start) should have continued when the race(same as coverage?) went past 7:00pm. The recording stopped at the scheduled 7:00pm time. Should it have kept recording? I'm not sure how to interpret the logs and the entries around 6:40pm only added to my confusion.
I'm submitting this post and logs so that you may determine if everything I tried to do actually worked correctly.