The line shouldn't be far off 80Mb in 2 days after interleaving is removed and G.INP applied.
Why don't you set the modern to 192.168.1.254 and just connect LAN 2 to spare port on the router or to a switch if you have one?
Most ISP's don't understand the FTTC DLM.They have absolutely zero control over it.
. . . does everything else look OK?
Not sure how well you can read the below.