LOL, no problem man...it drove me nuts too, i was greasing everything from control arms to tracbars to try and figure it out. Yours may not, but mine came back a few months later...on mine, the lower mount of the shock (bolt hole) is slightly bigger than the bolt itself so unless it's really tight then it has a tendency to slide up and down with the suspension movement.

 

Check your bake clips. Mine did the same thing. Drove me nuts!!!! Hope this helps!!