450R Rear Shock Not Fitting

I had the same problem with a 2012 450r shock. I'm glad you figured it out before I had to type what all needed done!

I actually got frustrated before I figured it out, and bought a 400ex shock. That's a nice shock, and your going to be happy with it over the stock one.
 
It should line up fine. Maybe just slightly to the left but all should be good..
like 1/8'' maybe ??