You didn't post the most important line stats information...
Line attenuation, expressed in dB. For your initial line speed I estimate a 60dB+ figure.
Signal to Noise Ratio, or SNR, also expressed in dB.
Which type of master socket do you have? Is the socket the type where you have the BT jack right slap bang in the middle, or perhaps one where it is in the lower section?
Your line speed readings are wierd though. 2Mbit download and basically no upload going to 1/4Mbit download and almost 1Mbit up.
I doubt BT would restrict anyone on 2Mbit to get them to upgrade. 2Mbit is reason enough to upgrade to FTTC.