It sounds like the toe-in is not adjusted properly. Installing those items changed the toe-in so if they didn't re-adjust the toe-in properly it can cause problems like this.
Personally, I would adjust it myself to make sure it's done right. With nothing more than a tape measure and a wrench, you can easily and quickly set your own toe-in and produce a toe-in result every bit as accurate as an alignment shop can.
Set it to between 1/16" and 1/8" per the instructions at Basic Jeep Front End Alignment
More accurate than measuring between the tires like the above website shows would be to clamp two pieces of 1" square steel or aluminum tubing to both brake rotor like shown below and measuring between them at the front and rear. Mark the tubing so you measure at points equal to your tire diameter.