Bug in Sins
This happened when I created a custom map to play on using the in-built map creator. I had 2 planets stuck together. Half was an ice planet, the other half was a desert planet. It was still registered as 2 planets, and so I had quite a bit of trouble attacking it because my units kept phase jumping between the 2 orbits of the planets. Screenshot's linked below. Hope it'll be fixed.
http://rapidshare.com/files/208201477/Half_Planet.jpg.html
http://rapidshare.com/files/208201732/Half_Planet.jpg.html