the issues with caffeine in those types of people are always clearance issues. these people are called pathological detoxifiers; they cannot clear even normally harmless chemicals from the liver.
it is a bit of a catch 22, but these are the types of people that most need to do things like coffee enemas or else they will forever be going around in circles. they will always be the people complaining that 2 sips of wrongly prepared tea made them deathly ill. the only solution for these types of people is to get the liver cleared out, and coffee enemas are one of the best ways to accomplish this. Liver Flushes are also another way to do this.
Uat: i think you are overdoing the coffee. 2 per day is too much especially if you are having sensitivity. i understand the eagerness to get all the crap out asap but it takes time and you have to balance out all the other factors. sleep is a very important thing. try doing the Coffee-Enema only in the mornings and don't try to go too fast.
my personal opinion is once or twice per week is about right, maybe more for extreme situations, but to do these things regularly twice a day is too much.
if you are doing the nutritional balancing program then give the other parts of the program a chance to work as well.