I believe tuners offer an LP map, as some insurance companies will only allow an 'X'% increase in power, otherwise they'll cancel the policy/refuse cover... not good if you're say 9 months in and building no claims discount. Then as soon as you've jumped ship to a specialist, you get your tuner to upload a 'full' map to your car.
Mistakes happen, how they are judged though should be on the service you receive in rectifying them.