Your Jeep has a track bar for both the front and rear axles so any suspension lift will pull the axles out to the sides. The rear axle will move towards the passenger-side, the front axle will move toward the driver's side.
Look at the letter Z. The top horizontal line represents the chassis of the Jeep, the bottom horizontal line represents the axle, and the diagonal line represents the track bar. You can see that lifting the top line would, via the diagonal line, pull the bottom line off to the side.
For small lifts, it's ok to have the axles a little off to the side. For taller lifts it's best to re-center them with adjustable length track bars.