How to stop auto advancing slides in Storyline after import from PowerPoint

Hi, Andrea.

Thank you for reaching out!

Can you confirm that in Story View, if you select all your slides, this is what you see in the Slide Properties?

If your properties are the same as the screenshot above, I'd like to look at your project to see what's going on. Would you be comfortable sharing your .story file either publicly here or privately through a support case?