the only way i can get the stats up is swap from lan 1 to lan 2 and run into the pc
You can usually run another ethernet cable from a spare router port to the modem's LAN2 port so you have both internet access & access to the modem stats at the same time.
windows 7
That's good as your MTU & RWIN settings should be automatically adjusted to suit the type of connection in use.
You could also try out the Windows Graphing Scripts that provide tons of connection stats.
connected via ethernet cable
That should be O.K. then.
long extension cable fitted inside bt master socket bt did it that way
That sounds like how mine was initially installed. It seemed fine.
max download speeds was between 32mbps to 38mbps while on the phone to talktalk 6 tests in 10 mins was 36mbps x6
if capped il not be happy
It COULD be a contention issue - other users downloading flat out etc. & hogging all the bandwidth.
What are speeds like at a "quiet" time (when most people are in bed for example?