Looking at some of the Nodes that have been created on a site before I started managing it, and says, in the Properties where it should display the Users Name, but instead it says builtin as the user. There is no such user with that name, so I am assuming that this is an Umbraco thing.

So, I kind of deleted the nodes because I was unable to order them, as it would let me order it, but the order of the nodes would not save and just went back to the order that it was in before, which is weird. But this could be part of why is said Created by builtin, so my question is, how could their be a builtin user creation? What does this imply? How to recreate the menus with the same thing that says: Created by builtin also? Is this part of code somewhere in a file? Or database table?

Any Ideas of where to start looking to find out how this was created?