The only thing elsevier manages is their website. The review process is managed by academics who also work for free. Typesetting is done by authors. Paper printing is basically extinct.
...or detract, one might add. I know of a researcher who has been meticulous about editing and wording, only to have the submissions "corrected" for publication to use the wrong word (existing, and meaning something different) for key concepts.
I'm guessing incompetence combined with standard dictionary computer spellchecking at the publisher's end.