My favourite recent MS naming confusion is myapps.microsoft is a SSO type place similar to Okta, but apps.microsoft is a shop, some of which I might own.
The "smart" feature in the UK seems to be add a temperature change every time you adjust the temperature, so your "smart" schedule is just the temperature yo-yoing throughout the day between 14 and 20C based on what you did in winter.
Then to edit it you have the worst possible UI and end up, like you said, turning all off the smart features.
I was working on Nationbuilder, a horrible all-in-one master-of-none thing, back in 2016 or so, and ran so many concurrent tasks in our BE that it started affecting all of their other clients. Waking up an engineer in CA was fun