Random sorting in views trigger mess things

Hi,
I'm using views to make a photo wall with 30 photos from the whole web with a random sort, so everytime I click to "photos" I see 30 different photos.
I'm ussing Gallery Assist as gallery in the nodes.

this photo wall is made of thumbmails, and with the lightbox trigger I see a big version of the photo in a lightbox view.

The problem is that with the random sorting, the thumbnail and the big version are not the same, so if I click in the same thumbnail I see a different photo in the lightbox. If close it a reclick in the same thumbnail I see another photo and if close an reclick the sime and...

So the random sorting is affecting the trigger field and the pop up field.

Here you can see the problem working:
www.explicitlanguage.com
Under the logo you have the menu. Click on "Fotos".

thanks for any words!