The Custom Page Layout background images were not updating correctly based on Group or Roles. Additionally, each css background image should be named uniquely
When a specific page layout was assigned to a subgroup, but the parent group was also assigned a page layout, the parent group background image would load. Moreover, if a user was assigned a page layout based on a role, this would be overridden by a main theme background image, or a parent group image. Users were having to refresh the system to ensure the corrrect images were appearing.