Hi Scott,
i see this post only now, after Corey made me noticed,
as i answered Corey about your problem by mail, i have few questions for you:
how did you clean EXACTLY the seats pre coating? did you use some kind of brushing while cleaning? did you use strong APC to clean pre coating?
from absorbing your pics sent to me , if you look very carefully you see that these white spots are only inside the pores holes of the leather , never on top of the surface "hills" ,
it could be two options :
1. it looks like hard brushing or strong cleaner that damaged the dye color of the leather. if the leather dye color quality is not high made.
im not trying to blame you or say its not the coat, i just say from my professional experience and from the short info we know about your problem , this is first option, while cleaning the leather there was too abrasive with strong cleaner that damaged the dye color of the leather. see carefully that the white dots are inside the leather pores only.
2. the leather you have has big pores structure ,after applying the coat, while wiping off the residues the surface was pores so there were left overs from the coat inside the pores , not remove well enough , leaving "thick" dot spots in them . as much as it is very durable coat , alkyl base solution such as APC (more than 10 pH) will remove the coat! its not permanently bonded to the leather paint.
it could be more likely option 2. you need to see gently if you try to "grind" one dot from the pores if it comes of, with small pin or something. if it does so yes its coating residue.
if you used APC , 3 times as you say im sure that the leather is not coated anymore now at least not on most of the leather surface, you can check if its hydrophobic surface , if not the coat is gone. which after APC im almost sure it is .
try first to test if you can remove one dot spot, if yes so you know its from the coat. then to remove them i would warm the leather so the pores will open more widely, expending, and use the brush you posted with APC without too much force , softening the surface will help better to enter the pores and remove these, if its coating residues!!
blaming us or the coat is easy , but sometimes user error as well can be factor for bad results,
we will help you as much as we can , Carpro never disclaim from responsibility if its product fault. Specially if it Corey involved and me.
try the tips above and lets see what exactly is the problem.