CSS column grid issue with sorting

Question

Inspired by this tutorial, I've set up a Fiddle that has 5 columns. That works fine with 5 images. With 6, however, it sorts it into 2 rows of 3 instead of one row of 5 and a row of 1. Other configurations have a similar effect.

Is there a reason for this and a way to prevent that from happening?

Answer 1

You should use as an additional style, like this:

   float:left;