What a crazy system.

[#1]

What sort of system is BT running. Just look at my following BT speed test.  IP Profile for on PN line is - 15000 Kbps.
How can I get a download speed of 10743 Kbps with a profile of 10000 Kbps and why is my profile only 10000 Kbps when my connection speed is 14335 Kbps?

Download speedachieved during the test was - 10743 Kbps
For your connection, the acceptable range of speedsis 4000-21000 Kbps.
Additional Information:
Your DSL Connection Rate :14335 Kbps(DOWN-STREAM), 1117 Kbps(UP-STREAM)
IP Profile for your line is - 10000 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 14.62:23.0:62.38 (SBE:NBE:PBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
The results of this test will vary depending on the way your ISP has decided to use these traffic classes. 
2. Upstream Test:  -provides background information.
Upload Speed
942 Kbps
 
0 Kbps 1117 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 942 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 1117 Kbps

[#2]

depends on who you want to believe, certainly not BT

[#3]

.....you really need to ask? 
Be glad you can perfom a BT speed test, I can't, it won't let me as the V8 router won't let me proceed 
I could throw some techie at you for the sync. answer, but I'm off to make a cup of tea, I only came on to post a reply to someone to blame them for getting me to following a PN IRC link! 

[#4]

Easy answer to this one George, your actually on a 15000 profile.

[#5]

Hi Adam, Yes but my BT profile is only 10000Kbps when my sync speed is 14335 Kbps and it's been like that for weeks.

[#6]

Nope, your BT profile is 15000 ATM, that's taken from line diagnostics I've performed. It looks like there may be an issue with the speedtest.