I'm the opposite of this
My line is generally very stable and it thinks I should be able to achieve 70Mbps on an impacted line
My upstream is actually syncing at 15Mbps, but downstream is only 51Mbps, sometimes 55Mbps when interleaving is off - currently it is on due to some electrical issues and power cuts. Now sorted.
I have no idea why my upstream is so good, but downstream is on the low end of expected.
Anyone know why?