You are burning oil on #2. It can come from the valves or the piston side. I'd run a leak down compression test to make sure you don't have a bad cylinder but just a worn valve guide. You should see some oil consumption that is out of the normal range as well.
The valves can be adjusted correctly with the engine in the car - absolutely. There are a million threads on this board about valve adjusts. On the 3.2 in a Carrera it helps to get all the accessories out of the way and jack it up nicely. Also, you will want the Porsche tool.
.028 or .032 - that's almost too close to measure. I'd go with the smaller gap - especially with the oil you burn, you want a sure spark to ignite it.
I am afraid to tell you, but unless you don't drive this car much, you are in for a top end. Only #1 and #3 look like what I'd call normal, everyone else is burning oil.
George