Control arm link & oil vent

[shlim8]

Hi, I was just checking the rib belt through the access behind the seats, on my 2001 boxster when I noticed the following 2 items:

The rear driver side (rear passenger for US cars) rear control arm link mount (not the side that links to the wishbone/control arm) seems to be oily (there are rubber bellow to the top and bottom of the rubber mount). Is it normal to grease those joints or is it a sign that it's failing ? In fact both sides are greasy, just the driver's side is much more greasy.

Also on the rear passenger side (rear driver side for US cars), there is a pipe with a vent that seems to be venting out oil - not much but enough to coat the surrounding area with oil but not enough to drip to the ground. What is that vent ? It's to the right (if u are facing the engine) of the a/c compressor.

I had taken pictures but still trying to figure out how to insert them into the post here ! (ah success !)