Ok , i looked at the pics and heres my take on it.
Aside from the obvious out of round,If you look at the 2nd pic you can clearly see that there are burrs/roughness on the inside if that hole and between the two...theres the rub, so to speak.
You could take a round file or even a 1/2 round file and go at it till you have all or most of that out....but be careful, kershaw knives work on decently close tolerances,proper alignment and adjustment to work properly and smoothly. If you enlarge the hole too much, youre going to end up with a blade that will slop around on the pivot and no amount of tightening will solve it. It will also probably wear the heck outta the pivot too.
You could also, as some have stated, loosen the pivot, but then, especially with the long flipper on these, you could be setting yourself up for it to be open in your pocket and getting cut but good. Also, loosening the pivot removes the build up of pressure on these if loosened too much. If you do this always be sure it's blade is up against the side of your pocket to keep it closed. And always look before reaching in your pocket.
If it were me, i'd contact Thomas W. here and let him see the pic's....before i did anything.Customer service being excellent, i'm sure he'd either be able to tell you exactly what to do, or replace the blade for you.
Just my 2 cents.