You removed the line, not the PCV valve, and then connected the new hose from the CC to the PCV valve. What boosted_orange is talking about is removing the PCV valve itself, drilling out its insides to turn it into a simple tube, and putting it back. Then you connect the house from the CC back to the gutted PCV valve. The only problem for you is that the Mishimoto CC doesn't have a check valve, so it can't be used with a gutted PCV valve, since one of the functions of the PCV valve is to act as a check valve to keep boost out of the crankcase. The UPR dual-valve CC does have such a check valve.
The why is that the crank case pressure is too high at idle. By drilling out the PCV the excess pressure vents easier. There's likely more than one way to skin this cat, but boosted_orange is the only one that solved the problem with stock idle so far.
It's been covered in this thread why the car is smoking..excessive crank case pressure causing the oil not to drain fast enough from the turbo causing oil to get past the seal onto the exhaust side of the turbo causing the smoke. With the stock exhaust there is enough pressure to keep the oil at bay but when an OR downpipe is introduced the exhaust back pressure drops below the engine pressure which causes the oil at the turbo not to drain fast enough that's why the smoke is only present at idle
If you have the mishimoto it's just a matter of adding a check valve on the clean side (intake side) just to prevent boost pressure to be introduced into the CC
