Troubleshooting 1G+. Sanity check on signal strength.

This started when I tried to enable LAGG on my modem. I was able to enable it and get it communicating but could never get an IPv6 address assigned. Obviously not a big deal as service is working and decent speeds, but I have heard rumors and I am chasing the 20% overprovision 1.2Gig here I come.

Tried all kinds of combinations of setting and configurations. I have found that LAGG enabled with only one Ethernet cable plugged in or LAGG disabled both work fine.
If I plug in the second cable after getting fully connected I keep the IPv6 address, but if I reboot or release/renew it will not get the IPv6 address or in some cases any address. So I left the second cable out for now in case of a power or network outage.

IPv6 should not be a big issue, and the internet does work. But, some webpages have to be reloaded a few times and a lot of smart tv apps do not work. As soon as I get an IPv6 address everything is fine.

Saw this post, someone at the very end claimed the same, but it was not the focus of the thread so looks to be unanswered. https://forums.xfinity.com/t5/Your-Home-Network/Link-Aggregation-SB8200/td-p/3348468

My setup
I think there is a comcast owned repeater in my yard (small green cylinder). Coax cable run under and above ground through the yard straight shot but rugged terrain, maybe a few hundred feet. Coax pops out on the side of the house. Service loop and into a ground block. Coax enters the house 20ish feet. Passes through a Belkin power strip with surge protection for coax. Coax enters a Extreme 5 port amplifier. From an amped output into an MB8600 modem(self-owned).
Ethernet out of the modem 6 feet to a PFSense (self-owned) Cat7 cable. PFSense has 10Gig Ethernet ports, the WAN port negotiates to 1Gig
Ill stop there as I know the rest is my network and is highly dependent on my equipment.

Running a SpeedTest CLI on my PFSense I get between 300 and 700, I have see as high as low 800s.

Selecting best server based on ping...

Hosted by Windstream (Atlanta, GA) [29.44 km]: 13.277 ms

Testing download speed................................................................................

Download: 693.36 Mbit/s

Testing upload speed......................................................................................................

Upload: 32.69 Mbit/s

 

Looking into Modem signal levels I get the below, but I am not sure what I am looking at. I have called the 1800 before but hit a hard wall when they see I own my modem/router. I have not called specifically about the this LAGG issue. Hoping for better liuck here.

I did bypass the surge protector and amplifier and got -4db across the board on the downstream so the amp seems to working as advertised.

I have not tried bypassing my home completely and going straight to the service loop, but might try that this weekend.

Can someone look and tell me if I am on the right path here or if the signal is good and I need to look at the other side (my network) of the modem.

 

Thanks