I'd don't know why, but I haven't seen a single visual editor for wiki markup or HTML that actually works.
I was really impressed with MailChimp, for instance, until I got to the visual HTML editor where I could never figure out how to not get my whole message screaming in <h1>
I was really impressed with MailChimp, for instance, until I got to the visual HTML editor where I could never figure out how to not get my whole message screaming in <h1>
#fail