Boxes that take up more than the visible columns disappearing

[womweb]

First of all, fantastic plugin; but I am struggling to get one last bit working well.

When I have a box that has a width that requires a greater number of columns than is being shown on screen, the box just vanishes. So, for example... if I have a box that is 3 columns wide, when the grid is shrunk down to the width of a mobile phone, freewall only wants to show you boxes that are 2 columns wide or less. This is the behaviour as seen on the freewall homepage.

What I want to happen is that the box would stay on screen, but would be 2 columns wide as the larger boxes would be promotional items and of course, I would want them to stay on screen!

Is this achievable and if so, how can I achieve it?