What everyone is describing to you (dead end psi etc..)is 'calibrating' the controller, but from what i can gather from the first post, you've already tried?
'Mr Bitt's ' post describes how you should calibrate/dead end your controller, but without knowing the actual controller type its a bit hard to tell you exactly how to do it yourself
If its this one -
http://www.purefreedom.co.uk/flowmaster-digital-pump-controller-p-259.htmlThen do as mr bitt says with the flow running, and then press & hold the left and right of the 3 buttons of the 3 until 'cal' shows up
Scroll all the way down to 'auto'
Press enter (the right button)
After a few seconds a number should show up
Press enter again
Controller re calibrated
You may need to do this again in the spring/summer as the air temp effects the pressure setting due to the varying density of the water
I'd imagine you've paid a fair whack for your system buddy, so ring purefreedom if you're getting problems (although it does sound like it hasn't been calibrated properly)