The galaxy droid is a normal glitch that everyone gets if they trigger it right. I think it's if you go back to the planet you were just on after the leviathan or something. While it's cool at first, it can be a bit screwy. When I first got it, I took my 2 Zaalbars to Taris to mess around, but then I realized there was no way off Taris. So, like you, I got screwed and had to reload an old save
So now if I get it I don't use it to travel anywhere I haven't been. And now you know it's a glitch everyone gets if they trigger it right. Dunno what it comes from though.