Vigilance

Well when i activate my vigilance, it works now when i have detect and height on and such... but the problem is... there dosent appear to be any limit on how many times i can become vigilant...i could be wrong, but i only thought there was 3 vigilance... the one to see hidden, invisible, and to tell the diffrance between a wild yell.. and a normal yell... but when i type in vigilance it keeps putting up more.. i had over 12 on my score at once.. i dont know if thats suppose to be or not.. just thought id let you know