I have this same problem in the A330 300. Everything is ok until I select a Star and it calculates various points on the flight plan as thousands of miles away. I tried a flight from Bangkok to Singapore and it had one leg at 7700 miles when you try to delete it, it simply moves the incorrect distance down the flight plan, making It impossible to fly the route. It doesn't occur on all routes that I have tried only random ones. Many thanks.