Correctable and uncorrectable codewords on 50mb

Since Tuesday when the engineer came out to fix my connection that kept
dropping TOUCH WOOD! its been ok and no drops.

Speed downstream wise is fine at 49mb (5.9mb/s downloads) BUT! i still get only 1.3mb upstream (161k) no idea why.

Anyway im still getting T3 errors which dont seem to be affecting my
connection from what i can see and local network apparently aware of this as
theres STILL! an ongoing problem with the Motorolla BSR in Swansea.

Current count since modem was last rebooted on Tuesday is.... T3 Errors 39

Also i seem to have a lot of Correctable and uncorrectable codeword errors
Correctable
Codewords 12526 16553 19048 20368
Uncorrectable
Codewords 281 382 266 266

Should i be worried about these as i really dont want to go through what i
did on 20mb when my modem was put onto the BSR and i had nothing but
problems for 5 months and problems which are still ongoing for some people
in Swansea on 20mb on the BSR where my connection kept dropping out and
rebooting and not locking on to the network.