I added a slide to the Content Slider (happens to be a Video linked to a remote resource). Using the up and down arrows on the Content Slider ‘Slides’ panel moves the Title to the correct slide item number, but the actual slides don’t rearrange.
I’m presuming that this is what the up and down arrows are for? The ‘?’ help button takes to you a Page Not Found web page.
That looks like it might be a bug 
For now you can drag and drop the contents between the slides using the Node Browser if you need re-arrange them.
Hope that helps.
I’m also having a problem with Content Slider. I made something with 3 slides. After I saved, and restart, I only get the Content Slider component. But all things inside I can’t see. If I check with a browser, everything is OK. But It’s not possible to change things, as the inside components are gone.
Edit : Now I see I can select the slides inside the component. Problem solved.