2017 Silverado Superlift 3.5" Issues?

[BernTheMars]

I ordered the 3.5 control arm kit a while back for my 2017 and finally got around to putting it on. The first issue I came across what that the ball joint didnt leave enough space for the cotter pin once the nut was tightened. I called superlift and was told to use the factory nut. Ok no biggie. Moving on the the diff spacer. I put the spacers in (2 thin ones in the rear and 2 thick ones in the front) and once tightened down, the bushings are at on odd angle. I tightened the rear mount first as stated in the instructions. If this is normal, then its fine, but im here today to ask you guys if thats okay. I appreciate any info on this issue (or non-issue). Also the kit came with these two bearings that are not mentioned in the instructions.

Edited November 8, 2020 by BernTheMars
clarification