you are pushing enough boost to need more crank case evacuation.
there are 2 schools of thought when you are in that situation.
1) increase the amount of evacuation by ditching the PCV and installing a breather filter which doubles your pressure relieving power. another bonus is that the oil fumes from the PCV sitting in the intake manifold can no longer increase detonation chances in boost.
2) keep the PCV cause everyone love silly emissions components so much, and then put a can on the end of the passenger side spot going to a "catch can" that will catch the oil. you must empty the can periodically if you get lots of oil.
3) some people do both remove pcv and run both sides to a catch can. you have to do this if you run serious amounts of boost we are talking high hp buils and then you would probably already know about this beforehand or your tuner would have looked at you funny.
I like to ditch the pcv on the drivers side, and put a breather on that valvecover, for me this relieve the pressure enough to not push out any more oil for the levels of boost that I do run. I also modified the passenger side hose barb to be larger and go straight up so both breathers effectively drain back into the valvecover, hence the valvecover is my "catch can" without the lines. the problem with the stock hose barb on the passenger side is that its at a right angle, so any oil on the filter will just seep down via gravity and end up on the exhaust or ground and splatter all over the bellhousing. also its quite small stock like a 3/8" size, so just having one of these in a small size you can see why you have pressure buildup issues and then why it leaks on the floor.
here you can see my latest setup at the toyota meet in colorado I finally did get the valvecors installed with 1 large breather facing straight up on both sides. I don't have any oil leaks or sprays with this setup with the boost I run.
I think its both elegant and efficient to have matching filters on top, and its something you cannot do with GTE valvecovers as they are too tall, on a GTE I would run 2 lines to a catch can and have 2 breathers on that. You can do it on a GE also but if you don't need 2 extra lines and a catch can then why install it you know. I like to keep my charcoal canister in the factory spot i don't like the gas smell with it deleted for a catch can install in its place so this works perfect for me I get to keep my charcoal canister and my oil in my engine.
so here is what it was like when it was stockish with PCV and small right angle filter (boooo!!)
and here it is how I am finally happy with it.
I had kicked the idea around of runnning 2 filter on the passenger side as above in the thread, but the rear filter did interfere with the heater hose coming out of the rear of the block. I could have rerouted it but chose not to as these 2 filters seem to be doing the job very well. I have not had any oil spray at all yet, but I am sure that there is some combination of boost and worn piston rings that would make it spray its not happening to mine is all I can safely say.