When you set the advantage, Xconq multiplies the desired advantage with the normal number of starting units, then divides by the default advantage and ROUNDS DOWN. This means that you might end up with a lot fewer units than you thought. For instance, suppose that you have a game where each player starts with one large city and five towns, and this is considered to be an advantage of 10, because one large city is worth about as much as 5 towns. Then if you select an advantage of 8, and your opponent selects 14 (because you're a better player perhaps), Xconq will give you 8/10 of the normal setup, which means four towns and NO large city. Your opponent will get 14/10 of the setup, which works out to one large city and seven towns, which is really a 1 to 3 disparity, much more than the planned 4 to 7. This is not a bug, just a limitation of the method.