DVR Functionality on last watched channel
Enthusiast - Level 1

As long as I have had Fios i have noticed that if i'm going back and forth between 2 channels (ONLY) I have the option of using DVR capabilities or rewining as far back as I want (from when i started watching that channel)  but today if i change channels from Channel 1 to channel 2, there is no auto-record of cache of channel 2, why is this removed? Can it be placed back into the dvr functionallity? 

And by the way i have quantum, only 3 STB, no content currently being recorded.