So i literally just created my account and when I went into my account settings to change my avatar image, boom i see my password displayed in my "books read" section. Now I could have been a turbo noob idiot and typed it in there while i was making the account but I cant remember doing so.
Not sure if you've fixed the issue, but for the record, I can't see anything that resembles a password in your profile on my end, so it looks like it could be limited to your side. Maybe try clearing your browser cache and cookies?
It could be that when you sign up there is no confirm password box like on a normal sign up page, you (or your browsers auto fill) might have put it in the next box as well.