Fibre Speeds, Did I muck it up?

[#1]

I am new at this so not sure where to start or what information to provide.
After being activated on the 27th October and receiving Speeds of nearly 46Megabits (The Max I can get according to BTW Checker is 47.5Meg, Low is 34.8 [Which is the estimate Plusnet gave me]) after 10-11 days of service its now at 38-39Meg. I am Using a ASUS DSL-N66U and a MK2 Faceplate. (Now testing in master socket but no changes....alot less CRC Errors noticed without the mk2 faceplate though)
I will admit the first 2 days of service I was mucking around with the ASUS DSL Settings alot such as attentuation and such. So there were alot of resyncs at that time. But on the 3rd-4th day I set it all back defaults. Did I screw up the DLM testing? Is there anyway I can have my IP Profile Reset back to 78Meg so it can detect my speeds again?
Speed at Activation: http://www.speedtest.net/my-result/3864239233
Current Speed: http://www.speedtest.net/my-result/3888476614
Below are my current line stats if it helps.
DSL Driver Version FwVer:5.4.11.25_A_TC3095 HwVer:T14.F7_0.0
DSL Link Status up
DSL Uptime 0 days 1 hours 22 minutes 45 seconds
DSL Modulation ITU G.993.2(VDSL2)
Annex Mode ANNEX_A
SNR Down 6.0 dB
SNR Up 6.2 dB
Line Attenuation Down 26.0 dB
Line Attenuation Up 7.9 dB
Data Rate Down 39411 kbps
Data Rate Up 10488 kbps
MAX Rate Down 51960 kbps
MAX Rate Up 10489 kbps
POWER Down 6.6 dbm
POWER Up 6.7 dbm
CRC Down 0
CRC Up 4

[#2]

Hi and welcome to the forums,
I've done a quick test on your line and there is a potential fault. Can you please raise this via this link on your account? I've made a note of the error that I've got on testing and hope this will assist the faults team.
Tony

[#3]

Thanks, I've raised the Fault through my account.

[#4]

Hi,
I've clarified a point or two on your account. If you have any questions, please let me know.
Thanks,
Tony