As I've said elsewhere, justice involves treating similar things similarly and different things differently. I believe that I've also mentioned the fact that certain particulars--especially certain relations--are not simply circumstantial to acts, but play a part in defining the object of an action. And I am quite certain that I have spelled what I believe to be the connection between justice, relationships, rights and duties. The point being, of course, that the particulars of a situation can play a large part in whether or not an action is just or not, and even whether an act is objectively evil or not.
It is illegitimate to abstract actions away from important particular details so as to attempt to judge an action moral or immoral. One cannot abstract the sexual intercourse between a man and a woman out to nothing more than the physical action in an attempt to argue that fornication is moral since it is no different than the conjugal love between a husband and wife. It is illegitimate to abstract out the act of shooting a gun at another man to simply pointing and pulling the trigger to argue that there is no difference between murder and legitimate self-defense. In both these situation the particular relationship between the agent and the subject is fundamental to the object of the action and the attempt to ignore these particulars by illegitimate abstraction is pure sophistry.
In the same way, it is illegitimate to argue that it is hypocritical to be opposed to the secession of Kosovo from Serbia but to be neutral-leaning-towards-favorable for South Ossatia to secede from Georgia and join the Russian federation. The particular historic and existential details are enormously different in the two cases, and this effects what is the just decision in each. To whit:
Kosovo is an historic part of Serbia. There is no historic basis whatsoever for an independent state of Kosovo. An independent Kosovo does nothing but create a state run by Islamic mafioso in the middle of the one of Christendom's first bulwarks against assault by Jihad.
South Ossetia is not an historic part of Georgia. Indeed, its history supports its separation from Georgia and its close allegiance with Russia. The reason that South Ossetia is a part of Georgia boils down to "because Stalin said so."
These completely different historical relationships make a difference in judging the justice of the two situations. You could say it's hypocrisy to have different views on the independence of Kosovo and South Ossetia, but you'd be wrong.