I don't believe 'unbalanced' is a specific status. I believe most results specify the penalty for being unbalanced: e.g. must parry next round, loses initiative, etc. I don't think there is a specific condition called 'unbalanced'; I think that is essentially flavor text. The rest of the text in the critical box should specify what exactly the penalty is for being 'unbalanced', and it can vary from losing initiative to having to parry etc.