RO DI questions

[Milad]

so i just did some measurements on pressure
80 at the tap
45 open flow after the pre filters before the membrane (also after the auto shut off valve which im not sure if it makes a difference)

now that being said, i have a flow restrictor on the waste and since last night its been set really low waste flow so the preasure is at 75 before the membrane (not 45)

so this 8am this morning until i got home from work, the 180g tank has filled 1/2 inch!!

thats 3.5gallons over 11 hours. that cannot be right!