First you need your own water test for hardness. Then you need to set up your softener for your family size; K of capacity dependent on salt dose lbs which allows you to set the number of gallons between regeneration correctly.
Then you do 2 manual regenerations back to back at the maximum of 45 lbs of salt, with no water use during or between them. That's to regenerate all the 3 cuft of resin. And you do that for each tank so it goes, tank 1, then tank 2, then tank 1 again and then tank 2 again 92 per each tank).
Then for the next 7-9 days do a hardness test on the softened water. If you find hard water, THEN there is something wrong with the softener.