Missing header on blog list page (7.1)

Site URL: https://www.salesdev.global/startup-stories

Creating a new Squarespace web site. For some reason, the Blog page does not have a regular header graphic. I'm sure I did something wrong at the start, but all the page headers are different and the Blog page has no graphic at all. 

https://www.salesdev.global/startup-stories

What simple setting have I missed?  Thanks!