Hi,
I’m afraid I do not have any real insights on this, but I have exactly the same issue. I was about to ask on the Ridizain support forums, when I saw this. I too want 4 pots across the page, but I am seeing 5.
Interestingly when looking at the preview generated through the >Appearance>Customise tab, the web page displays correctly. When I publish this page, it shows too many posts exactly as it does on your web sites.
Also, I notice the date ordering is being ignored after clicking Publish. It is correct in the preview.
Cheers
Chris @ forksinthepath