Hi Robert,
Please upload bigger size of image. Then it works fine too.
About slider background image it was not a transparent image. You have to set yourself transparency in your image.
About demo site content we cannot provide you. It is our multisite and all the data is in one place. If you get any problem then you can ask your queries here or provide us your temporary username and password at [email protected] with this forum link. we will set all the content for you
Thank you!