IC-40 Dead???

Maybe, what % liquid chlorine do you have? What % did you put in pool math?
You are not logging your tests and additions, so hard to help.
If the percentage match, then no, LOWER the pool volume by 500 and test it again, 30 min after next addition.
PM thinks your pool is larger than it is...that's why you got higher results (unless there is a % problem on the LC)