Oh, that's such a shame, as it's a brilliant airport addon
This doesn't have anything to do with the airport itself. As I've said, it's the AI flight models, not always being able to follow a curved approach, and the airport itself can't be blamed for having a curved approach in the first place, it's just the AI system wasn't really designed for this.
The AFCAD of the airport is correctly made with all the waypoints in the correct places and altitudes and correct headings too so, it's really our of our control.
Don't suppose you can 'recommend' any of the other AI traffic progs that work better?
It's not a matter of what AI pack, it's a model by model thing, I doubt that anyone has ever tested AI one by one on curved approaches, when developing JFK, we mostly tested with default AI, since there were no native FSX AI products available at that time.