Did you find the answer to this question. I’ve been having a similar problem with W3 Total Cache on my new site. The only way I could get this to work was to disable ‘Cache fron page’ under ‘Page Cache’ > ‘General Settings’ and then empty the cache to rebuild.
Exactly the same thing just happened to me as terrisi – same creation-date, etc. Also notified by Wordfence which picked up the difference 1 hour ago. I’ve done no changes to the themes. Nothing else seems untoward with the site.
@terrisi – did you figure out what happened?