Mmmm perhaps this is what I should do to avoid oil into my intake.

makes no odds, tis still a nice tidy motor .... enjoy it 

You need to read up on the PCV system, perhaps try wikipedia! I have been looking into this because on my car it looks like a lot of oil is being pushed out through the right-most breather into the air intake.

The smaller pipe from the inlet manifold plenum chamber to the rear of the rocker cover sucks gas from the engine rocker cover and crank case, and into the engine intake air after it has gone through the throttle. This small pipe has a valve on the rocker cover end that regulates the amount of gas allowed through according to the manifold vacuum, to maintain a slight negative pressure in the engine. This purges blow-by gasses from the engine without venting them to atmosphere (it puts the gasses through the combustion process again). The tube on the right to the air intake trunking is to suck in air to replace that removed by the small pipe to the manifold. 

I haven't yet worked out why it seems to be blowing a lot of oil out of this intake pipe, I am planning to fit a catch can in-line on this pipe to collect the oil to see if it does explain all of the oil I am loosing from the engine, or just a small amount. I don't think its a good idea to break the pcv system like you have as the engine is designed to work like this. 

I also read a post on another forum suggesting that the ECU assumes a certain amount of gas with reduced oxygen (the blow by gas) and adjusts the fuel mixture for this, and cannot compensate if you are not adding this gas to the manifold (because its all after the MAF sensor) - I don't know if this is true but it could mean its not running quite right when not under idle. 

Under idle the vacuum in the manifold is greatest and so the suction through the smaller pipe would be higher, with the pcv valve restricting this flow. As you have disconnected this completely I believe this has screwed up the idle somehow.