This helped (90%)
»I followed another users feedback to untick the consolidate CSS file option«
Now the structure is fine, but there is no header-picture anymore. So I switched back with “consolidate CSS”.
I guess there should be a better way… 
This helped (90%)
»I followed another users feedback to untick the consolidate CSS file option«
Now the structure is fine, but there is no header-picture anymore. So I switched back with “consolidate CSS”.
I guess there should be a better way…