All it takes is someone to be aware of (or even 'suggest') the various inevitable Canary Traps set up¹, after the initial revelation, and all this person needs to do is to leak the version(s) linked to whoever they want to unduly tar and feather.
(I'm not such a devious person, but I assume that anyone of note in this Administration is. In this position I'd be either hoping to be officially aware of such ploys (indeed, suggesting it, for kudos points!) or visiting desks of 'friends' and colleagues looking out for something as seemingly innocuous as a mismatched schedule before I made sure I was leaking information I was sure wasn't just BCC:ed to me, and (once it might have been) deliberately use the not-my-version information. It's so obvious that (normally) I'd actually be tempted to mix my own version back in there with indications that I'd had my shoulder looked over momentarily, to misdirect the inevitable meta-hunt for a devious desk-tourist. But would I really need to?)
¹ Mid-level Staffer A gets a version with Executive Time from 3pm to 5pm, a hypothetical meeting with a chummy press person at 5pm-6pm; Mid-level Staffer has press @3-4, ET @4-6,; other details sprinkled around.