Why are my air oil separators going bad? 2 bad in less than 500 miles. I noticed the puff of smoke on start up and so I changed the first one and original as far as I know. I did use an aftermarket brand on the first one. Drove it a little and no change thought it may have been let over residue, but never got any better. Bought the second one from Porsche dealer and put it in a couple of weeks ago. When I changed the second one I made sure I cleaned out hoses and intake to get all the oil out. Since the second one was installed I have driven about 100 miles and though I would pull the hoses and check for oil. Sure enough I find oil in the top of the air oil separator and a little in the hard plastic line going to in intake.
Why does it keep letting oil out the top? Has anyone else experienced this. I though i might have gotten a bad part on the first one but not 2 ack to back.
Many help will be greatly appreciated.

Overfill?

I figured if was over filled that much I would have lost some oil when changing the air oil separator but I’ll double check.

One other problem that I’ve had since the first AOS went bad is rough idle on initial start up. Temp and weather finest matter. If the car has sit for say 18 hours or overnight, when I start It will idle up and then as it drops it misfires rattles shoulds like the motor is about to fall out the bottom of the car. I immediately turn it off and right back on and it runs fine. Drive to the stores turn off come out and start it runs fine. Only does this after cool down and sits.
I initially thought it was the oil residue from the bad AOS getting on the plugs and making it run bad on initial start up. So once it burned to oil off the plugs it ran fine. Now I’m thinking there is more to this.
Ive see other post similar but not found what has fixed others experiencing similar problem.
Any connection to my bad AOS?

I actually am on the low side of oil. I based it on the fact the it was smoking on every startup at it had sit over night and found a considerable amount of oil in the hoses intake and top side of AOS.