I created a new account today on one browser, got tutorials, and went to help to stop all tutorials.
Then I switched to another browser, and got the tutorials again.
Then I went to a more regular PC of mine, visited Litphoria, signed in, and got all the tutorials again.
The "stop all tutorials" button should stop them all in every browser forever. I use lots of devices, so this was a problem. Another friend of mine has had the same experience, so it's not just me.