I presume the salty water is only the day after a regen, but after you have run a day's worth of water, the salt gets cleared.
If that is not the case, your TDS (total dissolved solids) in your raw water may be very high.
You could actually get some use out of an inexpensive TDS meter.
Your BD value may be too low, if the saltiness is only the next day.
What are your settings?