There is an option for setting up the 'Boxes by row' count on the 'Home page settings'. I noticed that setting the count to 5 boxes does not work (shows 3 boxes in a row on the admin home page).
Thanks for your response. I have 10 boxes to display and setting it to 'six', shows 6 in one row and 5 in the other. It would be better if the 'show 5' option worked.