div increases height, and moves a div next to it in Bootstrap

I'm using Bootstrap right now and i'm having an issue.

This is my code:

<div id="calendario" class="col-xs-12 col-sm-4 col-md-3 col-lg-3">...</div>
<div id="seccion" class="col-xs-12 col-sm-8 col-md-9 col-lg-6">...</div>
<div id="fotos" class="col-xs-12 col-sm-4 col-md-3 col-lg-3">...</div>
<div id="secciondos" class="col-xs-12 col-sm-8 col-md-9 col-lg-6 col-lg-push-3">...</div>

My layouts look like this:

But when my calendar height is bigger, this is what happens:

What can I do to fix it?.