Well, I changed some of the theme’s files an managed to get the desired result. The number of “columns” in the dashboard is still hardcoded, but I changed it to 20. And in the frontpage I added an external for loop that outputs four columns for each div. So, when you have let’s say, 10 columns, you’ll get three divs with 4/4/2 columns each.
If anyone have the same problem, reach me out at twitter (@diegocbarboza) and I send you the modified files.