See this video for an explanation.
Here is my site Read-Only: Webflow - The Society of Chiropractic Orthospinology
Hey @jimjmn , your Featured Image position is set to relative. If you switch it to static, your image’s Object Position Settings now work.
As for the Webflow UI sliding out of your screen, it does not happen to me, so it could be a cache issue for you. You could try logging out and in again.
Anytime, glad I was able to help. Happy designing! 
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