xAPI or How I Learned to Stop Worrying and Love the Spec

Why xAPI is such a game changer and you don't need to be a programmer to love and appreciate it. To be clear I'm also not talking about copying and pasting from some posts on how to do xAPI either!

Two authoring options, two ways to make different content

I've asked this before and no answer given.  I have a course that has a blue line across the top and I can't eliminate it nor do I know why it is even there. I'd appreciate help on getting rid of it. I'm not using timeline. 
 

Thank you

Learn how to create multiple xAPI endpoints that you can use when publishing your xAPI packages.

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In Flow, for some reason an accordion will change to a tab set when I view in the page in a 'small' preview, and my computer is zoomed out to 90% or lower. It is fine and in accordion format when it is on the normal - 100% zoom, but changes when you adjust the zoom feature.
However the accordion doesn't change for the other size previews, just the small option. Is there a way to stop this changing in 90% or lower zoom? as Tabs don't always work well with all accordion headings...
 
 

I have created several hotspots with actions over images that work fine in desktop view, but drift off target when viewed in mobile. How do I keep hotspots in place? Thanks for your help.
 

Steps through changing the cursor for hotspots so they are hidden. This uses project styles and one line of CSS code.

WCAG 2.1 says we should be able to zoom to 200% in the browser without loss of content, but at 150% our content runs off the page, with no horizontal scroll. We've checked in the publishing profiles and theme settings to see if zoom functions are limited but can't find anything. How do we prevent this loss of content at zoom from happening? Our content is in Flow.