When I did my 1st oil change I couldn't get out the rear most screw to the point it got stripped because it was over torqued from the factory. Your's might have had the same problem that the tech encountered.Thanks for the link, and spot-on, I figured I'd need to get an extractor set. Pretty cheap and not a terrible thing to add to my tools. Replacement JIS screw ordered and on the way (thanks to the member who posted the part #), a trip to hardware store for some bits, and I'll get it fixed properly in short order.
For the ones that aren't stripped, I have to say a proper JIS driver really fits in there securely. It's not hard to imagine how careless the tech must've been with whatever power tool he used to zip it tight, likely with the wrong bit.
I was still able to spin the shield out of the way with the rear most screw in place and complete my oil change. The tech if he stripped should have replaced the screw.