Occam's Razor,
You're probably correct. I was reading into where he posted "I actually have to push down on the slide on the edge of my countertop and push down with all my weight to get it to eject."
In that case, one area to check is the frame directly below the extractor. It might be that the bottom of the extractor has gouged or is hitting the frame. This could prevent pulling the slide far enough rearwards to eject an unfired round. I just knocked down that edge of the frame some with a file (just in case). You can still see some of the gouge mark and where I filed in this photo:
I believe that Ruger now machines that area on their LCP.
Regards,
Greg