That is... weird. I've just tried it and can't reproduce it. Can you provide more information?

Closing this thread to focus on this one:

https://leantesting.userecho.com/topics/284-is-it-possible-to-manage-right-for-profiles/

The Permissions module is almost done and currently being tested.

It does work, but Slack has changed the process. We need to update the instructions to do this properly, we'll do it shortly.