If that Uptime about corresponds with the full stats you posted then you have a lot of errors.
I reckon that, on Fast Path, Time Connected in Secs / Error Secs (ES) should be about > 60 (on Interleaved it would be far higher), i.e no more than 1 ES per Min.
However, router does not always reset ES on a resync. So reboot router and measure these after a few hours at least.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC