This K2 selected category page : primuslighting.com/index.php/gallery/gallery-all is set to show all K2 categories. This shows 6 from the category "Architecture" and 11 from "Cove and indirect"

However it does not show our newest items, even though they are shown on the category pages ( This shows 7 from the category "Architecture"): primuslighting.com/index.php/gallery/architectural-accent-gallery

Any Ideas?
• duplicated existing items don't show.
• leading items are set to 1000
• items are published
• items given older dates
• Joomla version current
• K2 version current
• to changes to my template over-rides

One is a category and the other is a module.
Check the module's settings to see if you have set a smaller limit.

Thank you for your response.

After a denial, curses and a denunciation, I studied your words, looked at the template over-ride I created years ago, full of modules placed in line and solved the issue.

Scroll to the bottom of K2 Item module "ALL ARCHITECTURAL PROJECTS," add the new item, drag to proper order, save. Works.

Nice to hear that you got it working :)