Steven Zahm@ Scott
RE: I am trying to get 2 specific categories to display first.
It is not possible to group the results by category. The Custom Category Order extension allows you to define the order of how the categories are listed. For example when displayed in the category drop down. It does not affect the order in which the entries themselves are displayed.
You can affect the order of the entries with the Custom Entry Order extension, here the link to the docs on how to set the entry order. This is field is found on the admin page when editing an entry.
My suggestion… edit each founder and give them an order of 1. Then edit each EO and give them an order of 2. That will give you the result you are looking to achieve.
Hope that helps!
ps. If you are using the order_by shortcode option, there is no need to use it in your case, please remove it.