I was rejected by the army for have dyslexia?

i have applyed for the australian army and had ped all their medical test and given them all the infomation that they needed they told me the dyslexia should not be a problem, i then recived a letter today saying that i was not able to contiue my application because of my dyslexia which i told them was not even servere. I was just wondering if having dyslexia can stop you from getting in the army