Oil Leak on 2003 4.4i is puzzling me

[SLOWBRA]

Add another thread on an oil leak to this forum...

Did some searching for the past few days on here, but nothing is really standing out so I wanted to post up my issue.

My X has a oil leak near the oil filter canister. I had the oil changed last week (by a buddy who used to work at BMW) and the oil pressure sensor replaced (I had heard a rattle on occasion on cold start and once saw the "Low Oil Pressure" warning). He also mentioned that he inspected some valve inside the canister (can't recall the exact terminology) due to my comments on the rattle and warning light.

A few days after the change I noticed quite a bit of oil on the ground on the drivers side. I cleaned the engine bay and areas where oil could have accumulated so I can track the leak. The next day I drove ~12 miles and again noticed traces of oil leaking. I was able to determine it was coming from the top of the oil filter canister. I saw traces of oil around the outside and front edge. My buddy came back over and replaced the o-ring on the filter cap and torqued it to ~25 lb/ft.

I drove it today and again noticed a leak. It's leaking around the edge of the oil cap, as if the cap wasn't tight or the pressure is just to high for it to hold. The cap is already torqued above the recommended 25 nM listed on the cap (I think 25 lb/ft is like 35 nM) so I am afraid to go further.

Does anyone have any thoughts on what I can do next?

Thanks guys!