As I'm not familiar with your specific controller, I can't advise on the details of programming that control.
With most controllers, the regenerative capacity is programmed as grains, not cuft while the salt setting is in pounds, not pounds/cuft.
While the softener may contain 1.75 cuft of media which could provide up to 52,500 grains of softening capacity, the amount of salt required to restore all 52,500 would be 26.25 lbs. Those settings then provide a salt efficiency of 2K grains per pound of salt.
Salt efficiency maybe greatly improved by reducing the programmed restorative capacity for that same volume of resin, while also reducing the salt dose.
As previously stated, for 1.75 cuft of standard resin, a 10 lb/cuft (17.5 lbs total) salt setting will regenerate 47,250 grains of capacity. (= 2,700 grains per pound)
An 8 lb/cuft salt setting (14 lbs total), will restore 42K grains capacity. (= 3K grains/lb)
A 6 lb/cuft salt setting (10.5 lbs total), will restore 35K grains capacity. (= 3,333 grains/lb)
Similar to a vehicle, while the gas tank may hold 60 litres to provide a driving range of 800 KMs, if you topped-up after traveling only 600 KMs, you would then expect to need only 45 L of fuel to restore the 800 KM range. If less than 45 L was placed in the tank, then the 800 KM range would not be restored.
As the salt utilized in a softener is similar to the fuel consumed, the salt setting chosen will determine the capacity (driving range) which will be restored. If the capacity being utilized is more than is being restored, the tank will eventually run-out before a regeneration cycle (gas station).
A softener unlike a vehicle, is able to obtain higher fuel economy (salt efficiency) when the tank is topped-up when requiring a smaller amount of fuel.
