Unwanted reversion of blogs

At some point during the past week, two blogs hosted on my site retroverted inexplicably: all posts and comments therein published after September 1st vanished, and alterations of these blogs’ respective widgets implemented after September 1st also regressed. These are the blogs:
https://robertbuchanan.info/CFS/
https://robertbuchanan.info/Omnium-gatherum/

(Nota bene: I’ve since manually reposted content penned after September first to CFS.)

The page I need help with: [log in to see the link]