I have fixed my desktop issue, it was a situation of image aspect ratio and as I am using the layout that is around 1200 pixels wide what worked for me was an image 2560 by 1075 not 2560 by 600 as listed in the documents.
BUT.. on my mobile device the banner sites at the top and then there is a huge space and then my call to action. I have to close that gap for mobile and tablet or do a work around to not show the slider on those devices.
Do you have any suggestions? When I make the image 2560 by 1555 on the desktop it covers the call to action.