It did not say to specify Private Request. It asked that you please differentiate between Public and Private Requests. A public requests, which the Autism.com request is, should be placed in an appropriate subcategory under "Articles."
Private requests are those that are sent directly to individual authors.
Ah, I think I confused my terminology. And I may have just resubmitted making the same mistake. I'm a newbie - having a little trouble navigating the site.
If I get it kicked back again, I'll try to figure out what I'm doing!
It's okay - there's a learning curve here. You can always delete and resubmit. Or, since I know you know the difference, I can change it for you at the time of review.