Lca bushing help.

I'm interested to see what's going on here? For whatever reason it's been awhile or a year at least I thought it was all one piece.. of course this is absolutely no help whatsoever but again I'm curious..
When I took them apart the center piece of the bushing was pressed on to the pin! There was the shell that i you have to weld the nut to and press out of the lca one rubber part and then the center metal part. The center i had to chisel off the pin! Now it's like the new bushing is smaller than the pin? I hope I didn't eff up and buy the wrong bushings!