Interesting - mine has been operating as a single event to unlock the hatch, but I don't know if I've checked it since the 2.0 upgrade. If a newer model is leaving the hatch unlocked until the lock button is depressed, I'm going to make sure isn't a software change that could be in 2.0. Will report back.
Checked last night and my unlock is a single event. When it closes, the latch release won't re-open it until the car or hatch is unlocked again. Others have already added that this is their experience too.