If you save your game in the final stage of landing after opening your parachute, save and quit, then reload the game, your parachute is not open anymore, you can't reopen it and then crash due to a lack of parachute...
My rocket (based on the Kerbal X) show the correct deltaV for the stages, but still emptying the upper stages tanks The last stage of the aspargus emptying at the same rate than the main thrusters and once they are empty, the next stage tank is empty too :(