Need help with front suspension rebuild

im sure I probably need a new pitman arm, I took it off the center link today and the bushing was done, and the weird thing is the crew from the joint turned when I tried to tighten the nut back on and the screw thing turned too, so I pushed it back into the center link a little more and then it stopped turning and I was able to tighten the nut on it. Don't know if that's okay or not.