bushido

This all started when I installed my Modshack stage III. Couldn't get the BM to hold boost above 15psi. Eventually decided to turn the BM off and reset the ECU, this resulted in crazy boost levels which are now the problem (completely removed BM and it's the same). I can now spike to 24/25psi with just the APR program, strange thing is, the stock seems fine now after a 2nd reset (it hit above 15psi on the first reset).

Things done:
- pressure tested
- checked N75 to wastegate hose (idividually pressure tested)
- bypassed N249
- new MAF, N75 and temp sender
- checked wastegate/actuator rod; nothing loose

And a new discovery last night while installing the 42DD downpipe, my O2 sensors are extremely white, so I decided to check the spark plugs which turned out white as well. I know this means I'm running lean, but the funny thing is last time I checked block 32, it was -7% for partial throttle; doesn't that mean it's correctly for rich?

I have a feeling I need to start VAG'ing it again. Any suggestions as to what to look at? Maybe I need to reflash the ECU? TIA!!