title: Div elements overlap on portfolio
body: <p>I encounter a problem when creating my portfolio... 
  It is done using the isotope filter to filter projects by categories.</p>
  
  <p>The problem is that during the first loading, the elements of the portfolio overlap instead of being arranged in a grid of 4 columns.</p>
  
  <p>After selecting a category everything seems resolved, I have scanned the code but can not find where my error came from.
  Here is <a href="http://tissier8u.0fees.us/wordpress/portfolio-2/" rel="nofollow noreferrer">a link</a> of the page concerned, temporarily hosted free of charge, in order to have access to the code.</p>
  
  <p>thank you in advance</p>
  
  <p>Julian</p>