rear lowering problem

[baz306]

hi ive recently lowered my axle done it by taking out the torsion bars and adjusting the height so the original height was 420mm its now 375mm but i have shortened dampers on the bk the arm needs jacked up 45mm so the bolt can go through the damper it then gives me a height of 330mm and its far too low ave never had to jack an arm up nearly 2 inch to get the damper in
do you think my dampers r far too short when i bought they were stated for a xsara n6