Uncorrectable Errors - Tech Questions

Few months ago I had issues with games randomly disconnecting. This started to happen after a wind storm that came through the area. I noticed DS OFDM channels had Uncorrectables. So I checked all my connections. Restarted the modem and waited a day. I logged into the modem again and seen more Uncorrectables. Non were on the regular DS channels.

So I contacted the tech support. They sent a tech out and he said he changed a grounding block and connections at the box outside the house and I'm good to go.

That night I had the same issue. The tech did mention something about a time to live or hearbeat connection. Which is when the connection stays connected but lags me out of games or drops the quality of the streaming video for a while then reconnects.

So I got another tech to come out. He gave me nothing but excuses and said he'll have a line tech come out and check the ped & everything else. Few days later a line tech came to my door and said he'll be checking things outside at the ped. That's the last I seen of him.

I waited a day and continued to have issues. So I then contacted Cox again and I was told a tech would be out again. This time it was 2 techs and they pretty much tried to point out I had a modem issue.  Then told them, "That's a new line from the wall to the modem, new cat cables, my pc has a 2.5gb card, and a new modem".

He then went on to say "Well gaming isn't optimized for broadband". I then said "well I shouldn't be losing connection completely.

I should be at least lagging". He said,"well there is nothing we can do at this point. Everything checks out". I then asked to setup another line tech to verify if the issue was fixed by the last line tech. The tech said "yeah. I can do that". I'm assuming he did because the following weekend I quit having disconnects but random huge lag spikes.

Which leads me to assume something was changed by a line tech or he switched a line at the ped for a better one, but with issues. For the past week I've had Uncorrectable OFDM Downstream & Regular downstream uncorrectables.

I have a tech coming out again this Friday. All the lines in my house have been checked from the modem to the outside box on the side of my house. First 3 tech confirmed they're fine.

I'm not sure what to tell this tech. Besides the fact of the uncorrectables. Would a tech run a new line from the ped and leave it above ground and setup a work order to get it burried to see if that fixes the issue?

What else can I ask the tech or show him/her? I'm attaching screenshots of what I'm seeing on the modem readings.

There is a 6db filter on the modem the 2nd tech gave me to put on at my request, due to online suggesting one if the readings are too high for something(can't remember exactly what it was).

Thanks!

[edited by moderator for  readability - CM1200 is correct?]