Losing template formatting when importing PowerPoint into Storyline 360

Thank you so much! I was trying to build a better mousetrap, so to speak. We have a new branded template that we need to apply to about 500 courses. I was hoping to import courses into Storyline and then apply the new template. But it looks like we're going to have to apply the new template to the existing courses first, then import them into Storyline and make adjustments here and there. I found that some of the issues with my first attempt had to do with some things that Marketing had to fix with the new template, so we're working on that first.