So all three tuners on both Hoppers work fine? You can check using YELLOW - BLUE - 3 - Send Status - Check Connection - Check Signal.
Also, again in YELLOW - BLUE - 3, click View Counters and page down until you see MoCA Devices. How many do you see on each Hopper?
Also, again in YELLOW - BLUE - 3, click View Counters and page down until you see MoCA Devices. How many do you see on each Hopper?