responsive columns

In order to get the columns to wrap, the proper code has to be added to your theme’s style.css in the media queries section (usually at the bottom)

Pick the appropriate query group and add the following:

.arconix-column-one-half,
.arconix-column-two-fourths,
.arconix-column-one-third,
.arconix-column-two-thirds,
.arconix-column-one-fourth,
.arconix-column-three-fourths,
.arconix-column-one-fifth,
.arconix-column-two-fifths,
.arconix-column-three-fifths,
.arconix-column-four-fifths { width: 97%; }

This will set the columns to be full width which should get you what you want.