Disregard what Jeeep wrote. He pretty clearly was talking out of his ass without actually paying attention to your setup.
Now, with respect to whether your axle is centered, I would be shocked if your axle shifted very much at all with just a leveling kit. Part of the reason I had you do the loosen, shake, settle, retorque on the control arms and trackbar was to to make sure those bushings were not bound up.
In any event, measure how much your front tires stick out from the fender on each side. The numbers will probably be a bit off because of the leveling kit (maybe 1/4" tops). Not enough to worry about in my opinion, and certainly not enough to spend the money to buy a new trackbar setup or brackets.