silver series rainsoft explanation.

I have a silver series rainsoft..with manual dials..I got it used..it was either 95 or 05 it was made in..probably 95..dont remeber right off..anyways..I hooke dup & never heard anything..went down tonight & reconnected & it started pumping out water out the backwash tube..well 25 min later its still doing it..timer is moving very slow.so I advanced it until it let a lil water in salt tank..maybe a quart then it went off on its own..is this normal or what..it is set on 12 on the dark side & number 1&4 are pushed on other button with it aimed at 4.5-5..backwash button is on 5..has a chice of 5-10-15 I think..salt lbs is at 30..How do I know if it is working or not..is ist suppose to pump water out for that long? would have been longer if I hadnt advanced it..
I did call rainsoft..they want 89.00 just to come out to look at it..any techs around that know what they are doing that can look at it?
Thanks,Brian
Nashville,tn