That's just how gravity and balance wheels get on. The idea of the tourbillon is to counteract this by rotating the balance constantly. Doesn't necessarily work though. The best solution is just to make the movement more accurate (with finer adjustment, amagnetic balance springs etc).
Yup, that’s what I thought. And also mine looses about 1-2s during the night if stored crown down. So, you can make it pretty much bang on.
Now... Paul Newman’s Daytona is going to be auctioned in December, anyone’s keen?
https://www.hodinkee.com/articles/paul-newman-rolex-daytona-steve-mcqueen-heuer-monaco-phillips-auction-news