[crisdux]

That's interesting. I don't have that issue. The height locks but the depth and width adjustments do not. I find that the force required to adjust the depth or width is sufficient enough that adjustments aren't made erroneously like you experience. In fact, I like that the width and depth don't lock. I adjust my armrests throughout the day depending on my seating position. I believe this was the purpose of not making them lock.

Maybe my model year is different or I use my chair differently.