I would think that if the in-room one was turned completely off (via the motion sensor), you should still be getting the default level of heat from the main system.
I think that's what's happening. If I set it at 72, it's turning off at around 68-70 if I settle in at the desk for an hour or so. Same if I kick it up a few degrees to 75.
Certainly not uncomfortable in the room because of a few degrees difference, and the manager's reception in the CL last night more than makes up for it ^ I was just curious because I hadn't encountered it at any of my other stays the past several months. I'm only here until tomorrow morning, unfortunately, so I won't make an issue out of it, but may just mention it in passing during check-out.