Unexchanged or at least a part of it goes to balance, but with those small coins it takes time to get sold. This is the way it works when you mine small coins
my "Unexchanged Balance" does not go into "Balance" about 2 days
what happens ?
Due to recent flood of hashpower into this pool we are sitting on tons of unexchanged coins which have no value. These coins will NEVER get exchanged because market volume is too high.