Um...The axles don't "shift" in their mounts, those are fixed on a link rear, unless you bend the axle tube or the chassis. There's just production tolerances and it's irrelevant anyway. If the axles shifted post assembly, the alignment would likely be off.
If the car is tracking straight, then the thrust line of the car at the back is lined up with the front and don't worry about it. If you're OCD and need this to be visually perfect, you can pull it over a bit with a panhard bar, at the cost of inducing a tiny bit of extra binding force on the bushings out back. Really OCD? Loosen up the LCA and UCA bolts, pull the axle over and retorque everything.
...or just drive on....
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto N/A tune. 100 shot nitrous on BBR tune. Best e/t 11.42 at 120.64
2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP