I can only imagine how frustrating it is. However, I believe there is only one set of control arms and not different ones for the lift and level as the person at Readylift said. Even if there was, the only thing that would be different is the angle of the ball joint, which would not cause your issue. I will be able to tell for sure soon enough. At the moment I have on the 2" leveling kit with their upper control arms. I have the 3.5" kit sitting in my garage and will hopefully be installing it Sunday. I will look at them closely side by side when I do but I do not think there is a difference. They look identical from what I can see now.
I also spoke with Readylift when I ordered it seeing if I could just get the pieces I didn't have yet instead of the full kit. They would sell me individual components, but he did recommend selling the new upper control arms and top hat spacer to recoup some of my money. There was never any mention of having to swap the UCAs out.