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Lightbox image gallery jumping multiple lines

Hi folks,

I’m relatively new to the Webflow Fam and having an issue creating an image gallery. If I make the gallery 3 columns and 6 images it jumps to 3 rows? Basically it displays empty boxes in the first and second columns of the second row.
I’ve tried everything around sizing and borders but can’t figure it out…

I’m assuming it’s something I’ve done wrong. Any tips? Page link below.

Here is my site Read-Only: Webflow - Airguides - Guided