Concerning the courses, please note that there are managed by the Course Grid Add-on plugin. To know more about this, please click on the following link:
As it is explained, you have to edit the shortcode and add the col function:
[ld_course_list col="4" progress_bar="true"]
Concerning the Grimlock Posts Query, you can easily show posts in four columns. To do it click on Customize and click on the blue pencil related to this section. Then, in the Layout section, you can choose a different layout. Please find the attached screenshot.
Hope this will help you.