Summary Carousel not displaying all items on mobile

Site URL: https://www.macarthurcorp.com/

Hello,

  Having an issue where the summary carousel does not display all the items at mobile sizes.  It seems to only show 3 (of 6 total) which is the same number set to display per row.  It only seems to work properly when I set the display per row to 1, however I would still like for 3 to show when on desktop.