Hi Shawna,
Happy to look into this for you!
Slide Master layouts should be included when you import slides from a Storyline 360 template. They'll appear as additional Slide Masters positioned at the end of the layout list in Slide Master View. If you're not seeing these Slide Masters when you import the template into your file, there's a chance an issue occurred during import.
Would you be willing to share a copy of your Storyline 360 .story and .storytemplate files here or in private by opening a support case so we can check what happened? We'll delete them when we're done!
