deck lid trouble

Can someone please tell me how to properly align my deck lid on my 71 dodge demon, first when you turn the key the trunk flies open so hard you have to keep your hand on the top of it and the second thing is the side to side fit isn't good. this didn't seen to bad until i put new weather stripping in the trunk.Now when the trunk is closed you can still see the strip all along the bottom edge...help please Doug