"Gift of Madness (Su): ... to become confused for 1 round. A successful Fortitude save negates the effect. This is a mind-affecting compulsion effect..."
Shouldn't this be a will save? Its mind affecting and clearly has a mental method of provoking the confusion.
Glitterdust blinds you with a Will save. Sometimes things are wonky.
I can see your point, but isn't the intent of the will save to show mental willpower, isn't that directly opposed to madness save in areas where the madness is a result of physiology such as poison or spores?
I just put it down to the oracle monkeying around with your glands, pumping out endorphins, adrenalin, dopamine, etc. Which would make a fortitude save appropriate.