lowering problem

[baz306]

hi guys i just lowered my 306 estate 55mm at the front and lowered the rear but i had to raise the rear up 40mm as it sat far too low but with it raised 40mm its still the same ride height i have shortened dampers on the rear and had to jack the arm up a good bit to get the bolt into the shock could the shortened dampers be the problem
also do i have to cut the bump stops on the front with shortened shocks