Thanks, all. I went to a local shop and was treated like a king. I ditched the WIX filter and replaced it with a Mahle. The Mahle, BTW, approximates the original Porsche filter cartridge, and interestingly the O-ring is noticeably larger in diameter than the WIX.
I talked to the shop owner and the mechanic who works exclusively on Porsches. I had evidently put the O-ring on top of the flange (which was reasonable, but not correct), allowing the oil to leak past the O-ring.
The Germans have an odd way of designing things at times, and in this case, their design of the oil filter and associated housing wasn't worth a shyt. They should have copied the filter design that has been adopted by both American and Japanese: i.e, allowing for a screw-on all-in-one filter, such as a Fram (I don't use the brand), where the gasket is on top of the filter. Here, all you do is unscrew the old filter, then screw on the new one. Piece of cake, but I suppose the German designers thought otherwise....they must be sadists at heart, judging from the way they have designed their BMW motorcycle turn signals. Maybe they are mad at the world (and especially the U.S.) for having lost WWI and II.
Anyway, I got squared away, but it was so unnecessary! Needless to say, I have found a shop that knows what they are doing!
Yes, I cut the filter apart, and found no metal filings or chips. But...hey....the engine has only 15,000 miles on it. Now, I have to be concerned with the Rear Main Seal and Intermediate Shaft Bearing, which will require replacement if and when the clutch craps out. A $3,500 "fix," from what I was told, using LN parts.
Seems to me that it would be a great idea if the Porsche body could somehow use Toyota running gear that is consistently reliable and which requires far less maintenance.