It happens... I did the same thing on my AADSAS app. My typo arose when I was copying and pasting things into the application from a word document.
Although it isn't great, (we are supposed to be dental material and thus detail oriented) its not the end of the world. I still got in, and you can too. It's almost insignificant when compared to your GPA, DAT scores, PS etc.
Look on the bright side. It happened on a secondary, and thus only sent to one school.