So i conquered a colony. I had it for 2 hours and took this screenshot of the details of my colony. Keep in mind i have added defense and claimed it so it is mine.
http://i.imgur.com/SqSx1zs.jpg
So if it cant be touched for 12 hours how have i repelled an attack already. You can see the time left is 6 days 22 hours so only 2 hours have passed of my ownership.
Seems either bad statistics or a big flaw. On test serve i definitely lost colonies within 6 hours so perhaps the error has followed it here.