Hello sergioral,
Thanks for reaching out to us!
I checked out your site and noticed the issue you’re describing after selecting some different filters. It appears to only be occurring with the photo view. This is definitely a strange issue to be having. As an initial step, can you verify that you’ve followed the Testing for Conflicts procedures to see if this is a potential conflict with an existing theme or plugin?
One idea could be that a plugin or your theme is also utilizing Isotope.js which is used for the photo layout. Some global settings for arrangement could be overriding the existing order defined by the plugin.
Let me know if this helps.
Thanks!