I dont use a trident so... i know nothing about the trident.
Looking at your codes for the dose, you're telling it to dose if its less than 9.1 and stop at 9.3.
Im guessing trident and dose talks to each other? Even if they communicates back n forth, you cant get an accurate reading right after dosing - it needs time for break down.
I just cant picture it in my head where the dose is dosing X amount while trident is testing in real time and telling dose to stop..
BTW i dont have a trident but i do have everything else, so i maybe so off here.