could be, but i think it's more just a standard affect of production making? i looked at my two versions a few minutes ago but i didn't measure them only eye balled them and the holes appears perfect. one has a small varience in the hole where the stamp that made it or whatever left a bit of a rough spot and a slight indentation, but hardly noticeable and has no affect on function so i don't care.
i think what you are seeing is the same thing i am seeing on mine...just an odd spot that wasn't sanded down from the stamp used to make it or the laser setup if it's cut...i have no idea how spyderco cuts that hole so i am guessing, but it sounds (without pictures to see it) pretty normal to me, and i wouldn't worry. if it loosk worse than what a reasonable standard of tolerance in production could be you could always take a picture and send it to spyderco and see what they say? just a thought.....