Hold on just a sec tho...
I was in the car the 1st time the #2 went. It was 100% without a doubt non-functional that day. The cloud of smoke was really really unbelievable. No way in hell could it have been slight oil leak or bag, etc. After it went, there was only 0.8bar max and absolutely 0 kick at 4k+ RPM.
Since your inspection, all is back to normal yet I think there is something definitely amiss. I took it for a spin Monday and it was really really hesitant to kick 2nd turbo, and when it did it wasnt solid at all. Sometimes it would come up slightly and then drop down to 0.8 again. Sometimes not come on at all.
On Monday, I was trailing behind you up the motorway when you were trying to give it stick. I flashed you down because of the same white smoke coming out the back of the car. It wasnt out the exhaust, it was from underneath / engine bay. Im talking about white smoke trailing about 2-3 carlengths at 80mph.
I would really consider taking it for a second opinion.