The issue here is that the user wanted to change their post author on the backend edit screen.
Solution:
If you're not seeing this then you will need to go to Toolset -> Post Types and edit your custom post type, under "Sections to display when editing" ensure that author is selected.
Once you've done this go back to the edit screen of your post and you should now see the authors option.
From there you should be able to select your post's author.
Problem:
The user would like to use Bootstrap from Toolset, but that breaks the theme's breadcrumbs.
Solution:
Apparently, both Toolset and the user's theme provide different styling for the breadcrumbs styles. We can fix this with custom CSS code. Such as: