While I am unfamiliar with this type of control, I am used to NTS and ETS on others. In my experience both these actions are backups to 'normal' s curve slow down and stopping. So I would also check why this isn't happening. NTS/ETS are also supposed to pull the lift up to floor level as well albeit harsher than normal. I have had it where lifts have gone thru the overtravel simply because the momentum was to great for these failsafes to work to operate in time, which is another thing to check.