The author is tied to the current user of the computer. There are three ways this could have happened. At least off the top of my head.
1. The document was authored using a computer registered in Lumb's name. For example, his old business PC that was kept within the company. So every time you save a document it saves it as the user/owner...Lumb.
2. The original word document was authored by Lumb and as such will carry his digital signature forward until it is manually changed or a new document is created. I have done this several times where I took someone else's template and saved over it as my own. Even though I saved it the document will have the original author's name on it. If you have any word docs from work on your PC you can check them out. If you go to properties you will clearly see either your work login username is in the author spot or the person that originally made it is there.
3. Lumb is the author. And as stated by nodummy back in 2011 Lumb is the behind the scenes guru running the admin side of things.
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