Question regarding Demonstrative Pronouns

Uhm, I finally reached the Demonstrative Pronouns portion of JWW’s “First Greek Book”

My question is regarding αὐτός, αὐτή, αὐτό.

autos is neuter, right? So why is there three different forms? Is it that one of these forms are for masculine, one for feminine and one for something else?

The other pronouns were clearer, this one is not.

αὐτός – masculine
αὐτή – feminine
αὐτό – neuter

It’s a typo in the webpage you are using: http://daedalus.umkc.edu/FirstGreekBook/JWW_FGB17.html

I suggest going to lesson 17 in the original, which will point you to the full paradigm in section 759.

I’ll contact the website author to get this corrected.