They look to be identical, but I'm starting to wonder if the cleats on my spin shoes are reversed L/R because I can unclip not by turning my heel outward, but can if I turn my heels inward.
I wonder if your cleats are turned out slightly on your shoes? That would make it harder to unclip to the outside, but easier to unclip to the inside. AFAIK, there's no L or R to SPDs the way that there is with Speedplays.