It's not one of my favorite gigs -- not that I mind the work so much, but it's not particularly remunerative and it's one of those jobs like the post office: it never stops. Unlike a book project, which like the book itself has a beginning, middle, and an end, this gig's like the US Mail. There's always more of it, and the production line never ceases. "Going postal" is a term that comes by itself honestly.
My job is primarily to review the work of copyeditors on very specific 400- to 500-word articles with such scintillating titles as "How to Become a Butler," the actual title I'm reviewing now. In the comments back and forth between writer and editor, the writer offers, "Butling (one t) seems to be the predominant spelling."
"Predominant" for whom, you might ask. "Damn if I know" would be my answer.
Merriam-Webster's (MW) does not recognize "butler" as anything but a noun, and "butling" is not a mentioned alternative form. MW also doesn't recognize "butle" as a verb.
Step 2: Because this august client uses AP, and AP uses Webster's New World College Dictionary (NWCD), I go there. Indeed "butle" appears as a verb:
Well, that's just freaking dandy. "Butling." (By the way, Oxford Dictionaries [OD], which you'd suspect would have something to say about "butlering," does recognize "buttle" and "buttling," but not "butle." OD also cites "buttle" as US usage, a statement about which I can find no evidence.)