I had a similar issue and I wound up having to do a door adjustment. The front door and the rear door on my passenger side were not closing together properly and I would get the door ajar chime and light when I would go around corners. You could tell the rear door was not closing all the way because you could hear a lot of air coming through it at speed and the sound the door made was not a solid clunk, but more of a crash. I found lots of scratches and marring on the lower strike area: evidence that the rear door was sagging and not hitting the strike area in the right place.
An adjustment helped, but was a pain in the ass and the problem is still not totally fixed.
See this thread: