[FLuXeXigeS]

this month while doing my first DIY oil change and Von Hep exhaust and rear tow hook install @ Danstoy in Santa Fe Springs, CA. we ran into a few concerns

1) the car seems to have an "oil leak" somewhere comming from above the oil filter, at first inspection we thought it was just oil run off from the last oil change, so we wiped everything clean before i set off on my way home. when i got home i found that the rear diffuser seems to have oil all over the rear edge of it(pictured provided below) looking like what could be that same "oil leak" we noticed BEFORE doing the oil change.

i guess my concern is has anyone ran into this problem, or does anyone have any idea on what it can be
last thing is will this still be covered by warranty?

from what we can gather, it seems like its comming from way up on top, maybe the oil from the S/C lines?

2) torque specs seemed to have been loose on the rear driver side suspension pieces cnsiderably more than the other 3 corners
any clue on why that would happen?

any help or info would be greatly appreciated!