I remember reading that thread, but concentrated on the possibility of bearing faults in the turbo.
It sounds to me like the remapper doesn't fully understand the channels they are manipulating in the ECU - I would ask them to re-instate the factory condition of your ECU and if they can't do this, to replace it with a new part.
If they are unwilling to do this, seek the advice of something like the local trading standards unit.
Once your car is back to how it should be, go to the PROPER experts - Stealth Racing and get the job done correctly, first time, with no smoke and no other bad side effects.
Cheers,
Mike