Yup, you're crazy. It's normal to have to do things like this to knives, even $400 knives. That is the reason you see so many knives with screw construction instead of rivet construction. I've had a Sebenza for about 2 months now and I have already disassembled it 3 times to do stuff like this. It doesn't need it, but I don't mind taking it apart to get the lockbar just where I like it.
BTW, the Sebenza comes with an adjustable stop pin, so you can adjust the amount of lockup you want based on how the stop pin is rotated when you reassemble your knife.
Good luck and enjoy.