Knock sensor and O2 sensors

[rs4m3e46]

Hello
Im having the following error codes:

P0330 - knock sensor 2 circuit,bank 2
P2231 - O2 sensor signal circuit shorted to heater circuit bank 1 sensor 1
P0050 - HO2S heater control circuit bank 2 sensor 1

The car are starting perfect,runs smoothly and very strong cald or hot until the first stop.After restarting(when hot) slight hesitation 3-4.000 rpm until the intake air temperature drops less then 20*C.Im thingink the ecu knows about the bad sensor and will <beep> advance only when intake air temperature is high and its probable to knock.
P0330 - its about open circuit (wiring) in knock sensor 2,bank 2(there are 4 knock sensors).I was changing that sensor(carbon cleaning in the same time) and the error comeback.Sensor 2,bank 2 is the one from left when you are in the car(driver side in Europe or passenger in England).I was reading that are a error in audi documentation and is posible that i was changing the wrong sensor...
One more thing - im sure the knock sensor code have appear after i was replaceing a O2 sensor(precat) with one Bosch direct replacement.No vacuum leak.Maf sensor cleaned with Maf cleaner.New sparkplugs.
Mods - kn filter,caf,port and polished intake,revo stage 2 custom,tune for 100 octane,millteck no precats downpipes,sport cats,milltek catback ehxaust.
380 wheel power.
Perfect performance otherwise:

0-100 4.3s
0-200 14.3s
1/4 mile 12.51 and TS 179 km/h
Can you help me ?
Thank you.