My VHF antenna feeds a Blonder Tongue ZHLSJ and then that VHF output feeds a CM distro Amp. So the ZHLSJ is either not working for 7.1 and 11.1 or the problem is not FM noise.
I did not know about this FMFOOL site. I will message you with my exact address so you can see the results. It would appear there is a lot of potential FM interference. However the CM7777 and the ZHLSJ don't seem to point to that as being my issue.
Thank you for the additional information by PM. It allowed me to make a more thorough analysis.
I answered your PM; hope you got it.
Thank you for making the FM tests. I did an FM Fool report for your location that shows the risk of FM interference is small. The strongest FM transmitter is 2.4 mi away but is only running 1 kW with a signal power of -32.1 dBm on 105.5 MHz. Its second harmonic would interfere with CH 13, but you get that OK.
I can post your TVFool TV and FM reports, and a rabbitears.info report image, but only with your permission.
I also have some satellite images that show a lot of trees in the signal paths. The NY signals not only have to go over rough 2Edge terrain, but through the trees to get to your antenna. I think that 13.1 does better, even though it is listed as weaker, because it is coming in on a different azimuth (111 deg) than 7.1 and 11.1 (105 deg).
I can also post the sat images with your permission.
I see solar panels on your roof. Are they solar electric or solar thermal? If they are solar electric, I would suspect inverter interference.
In the Google street view (2013), I see an antenna and I also see that the ground rises as you go up the hill to the SE.