New Hitron Coda56 modem and 2000Mbps plan - Not getting full speed

I recently upgraded to the 2000mbps plan and installed a new Hitron Coda56 modem. A technician was onsite today and found upline issues that he solved that improved my signal quality quite a bit. The problem is that I still get 500-700mbps most. I was able to get to the admin page by directly connecting to the modem. WAN status shows that while DOCSIS 3.0 connections are good, DOCSIS 3.1 connections are bad.

DOCSIS 3.1 OFDM Downstream

• DOCSIS 3.1 PLC power at -8.1 dBmV

• SNR stuck at 34 dB

• Correcteds are over 28 million.

• OFDMA upstream report power at 50.7 dBmV

I tried to explain this to support but I might as well have been talking to myself as none of them understood what I was trying to tell them. This is the reason why I am getting poor speeds. I am trying to confirm if the router has the most recent version Firmware but apparently even that was too big of an ask. 

I sighed, got another tech visit for tomorrow, hung up, and went to bed. Day 3 might have better results dealing with this item.