Section width's change alone

[Julienbloga]

Hi,

I added a form to a section with 2 column : at left the form, at left an image

The section has a gradient section.

The form has 3 steps.

First step : 3 fields

Second step : One field

So between the firth and the second step, the width column change automatically.

I would like to know if it's possible to fix the section width ?

Here is screenshots.

Hope you have an idea of how to fix it...

Thanks,
Julien