Had a few niggles with the interior trim and the car has only done 8000 miles.
Rear door not closing properly on occasion and I suspect this is down to the linkage mechanism that is used rather than the central locking itself.
Great fun to drive and will go really well when pushed. Corners like it is on rails.
Have only driven five hundred miles or so and already love the ride to bits.
Your rear door problem is probably on passenger side. Fit a wsher between each striker bolt betweent he striker and body then it will probably be OK.
Also there are rubber buffers in the door to adjust it and get the closing right, they may not be screwed in far enough.
Depending on what you were driving before, the ZS doors need a bit of a slam as the seal force is high, Good, stops rattles and keeps the car rigid.