Branching Scenario

Hi there,
Whenever I preview my branching scenario, I see a duplicated chapter in the drop-down menu (see attached photo for reference), but I can't find it when I go back to editing mode. Could this be a glitch that H5P is experiencing?   

I don't have the option of 'Branching Scenario' in my account. Any idea why?

Hi everyone!
When it comes to creating a start here page for a branching scenario, where is the option to add buttons? I'm new to this platform, so any suggestion is welcomed.