Full width portfolio???

Hi… Please please please does anyone know why I can’t get a single portfolio post to be full width. I’ve tried all 3 layout options (Above, Besides & 3 rows), but whichever option I choose I’m still getting a gap on the right of my portfolio posts. Almost as if a sidebar space or extra column is there. I’ve scoured the internet for a possible cause, but so far I’ve found nothing. I can manage full-width all across my website, just not on portfolio posts.

Here’s one of my posts where I’m trying to get the text to the right of my image

Portfolio post

Any help or advice???