I guess I found a bug in quora or maybe is a feauture. Everyone can edit the questions of everyone I guess, here an example with an Ashton Kutcher's question >>http://postimg.org/image/za4iafgnp/
Here's the link >>
http://www.quora.com/Which-publisher-has-had-the-most-books-on-The-New-York-Times-Best-Sellers-list