I agreed about what Jose sayed. Corsair law pretty clearly about Corsairs should not go to Liberty. So Corsairs dont.
Also Corsairs is not ''Libertys problem'' as I read in some infocard or on wiki. So thing that LSF ships could make their way to Gamma is pretty wierd. Or as Jose sayed: Corsairs will do some scout missions as well. Blowing caps that ''managed to spot'' them