My kit had the spacer at 1.25" thick, it generates 2" of lift due to the change in ratios in your stock suspension. I requested a 1" rear lift and got a 1" thick block. You are correct, your rear block should be 1.5" if you ordered the standard mini lift.About to do the PRG mini lift with the 2inch front and 1.5 inch rear blocks.
Question about the kit though, noticed that the front spacers are like 1.25 inches thick and that the rear block is 2 inches thick.
Is that correct? Unsure why the rear blocks are 2 inches thick and not 1.5 inches thick.