I have mine set not to sync every night so I was connected for 6 weeks and tonight tried a manual resync. Stayed on DLM1. My stats are pretty close to yours so hoping it will get a profile upgrade.
Mine's also set not to reconnect each night. The sync that put me on 17a was not initiated by me.
What's your attenuation? How far to the cabinet? Mine attenuation was 2db on ADSL and 5db in the 8b profile. The cabinet is at the end of my drive way, there is likely to be about 120m wire. I'm down a right-of-way with a number of other houses so I think I am getting a bit of crosstalk on the ADSL frequencies though and I have had pretty high error rates at times.
I think Snap said it was 2dB to the house and I was getting 5dB on ADSL now it is 6dB on VDSL. I am within 200m of the cabinet and syncing at 43Mb at the moment with error rate of 0.11 so I am hoping thats more than good enough if it will change.