i'm not going to attack you... but think about what you just said

1. it could be a pinched line, hole in the vacuum line or hooked up wrong like he stated. which would keep the waste gate shut and hence build more boost. because the wastegate is not seeing proper boost levels.
2. it could have boost creep, but i doubt it.. basically the wastegate can't expel enough exhaust gases so the turbo keeps building boost. common on your "bigger turbo's" with a internal wastegate
3. the spring in the external wastegate or adjustment on the internal wastegate could be for a higher boost levels which i highly doubt.

what professional did this?

i'm sure i forgot something but ah, yeah.. late + drinks =retard

ps. that auto tranny hate's you