A Stories page is used to display the stories added. It displays according to the settings given in Bethlehem > Stories.
If you want a particular background for your header on stories page, then set Header Background option as Default BG or Custom. Custom means pick your own style with multiple options.
You can pick header background option from Bethlehem > Stories Tab > General > Header Background.
Once we have chosen the stories page layout, we'll have the number of stories displayed per page. The number of stories per page is recommended to be a multiple of the number of stories displayed per row.
You can set the number of items displayed from Bethlehem > Stories Tab > General > Number of Stories Per Page