Is the clutch working OK? If so, new springs are a waste of money.
I'm not sure what you mean by "screwed up hard against their springs"; the nuts are supposed to be in contact with their springs.
If the springs are coil-bound, that's another matter, and the clutch wouldn't work at all.
The fact that the nuts show different amounts of screw thread is perfectly reasonable - the goal, as Chris states, is to get the plate to lift evenly.
David