This has been happening for over a year (Score 1)

Comcast is full of shit. This is the amount of data transfer comcast claims I used vs my actual consumption from the router (UniFi USG) and modem counters (both are roughly about the same) -- -- Oct 2018 - 463GB vs 438GB -- Nov 2018 - 348GB vs 329GB -- Dec 2018 - 888GB vs 437GB -- Jan 2019 - 7757GB vs 743GB -- Feb 2019 - 2284GB vs 621GB -- Mar 2019 - 1247GB vs 532GB -- Apr 2019 - 964GB vs 522GB -- May 2019 - 1347GB vs 561GB -- Jun 2019 - 1050GB vs 545GB -- Jul 2019 - 993GB vs 490GB -- Aug 2019 - 776GB vs 190GB -- Sep 2019 - 1258GB vs 688GB -- Additionally, in February, I moved and my modem was disconnected for 3 days, during those 3 days they claimed I used ~100GB of data.