title: WooCommerce Order By Price Not Working Correctly
body: <p>When slecting the option sort by price (Woocommerce dropdown) the products to sort in price but it's not working exactly;
  the first 6 are sorted: </p>
  
  <ul>
  <li>€ 1,50</li>
  <li>€ 11,75 </li>
  <li>€ 1,75 </li>
  <li>€ 1,75 </li>
  <li>€ 2,95 </li>
  <li>€ 4,50 </li>
  </ul>
  
  <p>Link to unfinished website:
  <a href="http://verduijncichlids.com/product-categorie/vissen-voorraad/west-afrika-cichliden/?orderby=price" rel="nofollow noreferrer">http://verduijncichlids.com/product-categorie/vissen-voorraad/west-afrika-cichliden/?orderby=price</a></p>
  
  <p>Anyone know what is happening and how to fix this?
  Cheers!</p>