Adobe Portfolio: Can't center my collection to rest of site. How do I fix this?

[gabrielkino]

Had to reply using chrome instead of firefox, wouldn't show the text box.

As you can see from the image below, the collection page covers aren't aligned with the masthead.

 
This is the bounding box for each page cover and descriptions.

[kglad]

portfolio questions: https://help.myportfolio.com/hc/en-us/requests/new?ticket_form_id=177168

portfolio faq: https://help.myportfolio.com/hc/en-us