Kai, you've seen that Cruiser going for your home planet, right? Only one so you should be fine.
In case any other people have found the movement bug, I think I'll be building a fleet next turn to sit on my home planet and defend it. Might even wait a turn, build up a lot of resources and make a much bigger fleet. Especially since PeterKaan managed to slip that cruiser passed me pretty easily, I certainly need a fleet there to combat anyone trying their luck.