Slight oil leak and what to do

Question on RMS vs. IMS...

My '07 2.7 Cayman has a "seep" discovered in the PPI. I have a year of warranty. I have looked at the seep myself and here is my question: Since the RMS is above the IMS, can you tell if the IMS is leaking or does the Rear Main leak run down on the IMS. The other way around would be clear. I'm worried about a GOOD diagnosis... Thanks, C.
 
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