IP Profile stuck?

[#1]

Hi,
I seem to have a similar issue to some other people with my IP profile being stuck at a low speed on the plusNET end.
I've just run a BT speedtest that gave the following info#:
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 3616 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 2000 kbps
    Actual IP throughput achieved during the test was - 1838 kbps
My router has been syncing at above 3000 kbps for at least a week, yet it hasn't changed the IP profile for some reason. Speedtests show a download speed of 1.8 Mbps as per the profile. 
Can my IP profile be set to 3000 kbps or higher please?

[#2]

AFAIK PlusNet don't have any control over the IP Profile that BT set only what appears in the member centre here https://portal.plus.net/my.html?action=data_transfer_speed
Are you sure there have been no points where you have had a synch under 2848 in the past few days?