I have a multisite setup using subdirectories, and it isn't clear to me how to avoid conflicts between pages on the main site and the names of the subdirectory sites. So when I have a sub-site named "site2" it is located at "http://domain.com/site2," but what happens if a user on the main site tries to create a page called "site2," which would normally get the same address "http://domain.com/site2." Similarly, what if I already have a page on the main site at http://domain.com/page1," and then I try to create a new site called "page 1"? Will Wordpress prevent me from creating a page/site with a new already used? give it a different name? or overwrite the existing file/site at that location?