Fleck 9100 problem

HI.
Have Fleck 9100 at home. I have the following problem. With one bottle is all good. Regeneration phase match, the water is soft. The second one I do not drink salt water. Instead drink pours water into the tank. During the phase of the pouring water pouring. Exchange lower seals & spa.cers and / or piston ?

So one tank either 1 or 2 is good but the other is not?

Water pours into the tank??????

Age of the system?
city or well water?

How long has this been going on?

Did you put the system in or did some one else?

I understand very little of that...drink pours water in tank?

During phase drinking water softener is poured into the tank of salt. The problem affects only one bootle.

So if I under stand this correctly only one tank is good and treats the water like it should but the other tank is like there is nothing there and does not treat the water?

Which tank is the bad tank?? that can be answered by looking on the control head at the little pointer under the motor , there are two pointers. The very bottom one shows which tank the unit is using to treat the water.
If the pointer is on say tank 1 and the water is good then tank 2 is the bad one and the most likely reason is that the distributor tube is not in the 2nd tank adapter correctly and the water is going in and out with out ever going through the media and can give a salty taste for much of the run.