Not getting 1 GB speeds with Arris SB8200 (Supported Modem by Xfinity)

I recently upgraded to the 1GB plan and I am not getting anywhere close to 1 GB download (around 400 MB off the modem itself) and I am very far from the expected upload (I was getting 5 MB upload off the modem itself). I know I will never get the full 1 GB speed, but I should be getting around 800 MB at least and the upload should be a lot higher then 5 MB (I believe the plan has upload at 30 MB or 35 MB, so I should have way more then 5 MB). Looking at the Event logs of the Arris SB8200, it looks like it tries to download the Comcast configuration file for an sb8200 on gigabit, but fails.

"SW Download INIT - Via Config file d11_m_sb8200_gigabit_c01.cm"

"SW upgrade Failed after download -Incompatible SW file"

A couple days ago, my modem restarted out of the blue (no power event, no commands sent by me, and I was in the middle of something online when it happened). The only I see is it was reset due to docsDevResetNow in the logs.

Either way, the configuration file being provided by Xfinity for the Arris SB8200 Modem has some problems (not sure if it is specific to the gigabit plan or not).