Madeinusa, welcome to the Buck forum. Recessed = it's seated too low. That couldn't be caused by lint, ect.. If the lock bar is a 1/16" low when in the locked position, I would not be concerned. But I'm not nit- picky. A deep seated lock bar is a sound lock-up. Cosmetic alignment but still mechanically sound.
If it seats 1/8" low in the locked open position then return it to Buck. Blade wobble is a easy fix as well, if you've done this before. If not send it to: Buck Knives
660 S. Locksa Dr., Postfalls, ID.. With a letter describing exactly what you want corrected on the knife and your phone #. Good luck. DM