Yes that was how it was originally.
I had my main and my wife had hers as separate. So we had two different Google smartapps. I removed both hers and my smartapps, then tried removing from Google home. Her Google home app removed the smart things setup. But mine can’t. I’m stuck with an error of not being able to remove it. If I try to sync the devices it says that the account owner needs to set up smart things. But I’m the account owner.
Edit: looks like you or something happened and it has now been fixed
Edit edit: looks like I still have phantom devices connected to my home account. So there is now double of everything in my Google home app. Then when I try to sync my devices I still get this issue stating that I’m not the Samsung account owner… When I am.
Edit: I’ve removed smart things from my Google home account. But it is still coming up with that issue. There is no link to smart things at all in my Google home. But still says I’m not the account owner.