It seems after changing the code on an advert, the formatting on the desktop version is completely broken. I cleared system cache which seemed to make it worse and now displays an older version (The forums title shows at the top which I removed in CSS)

Any ideas to get it working? It seems ok on mobile but again, looks like an older cached version.

You can rebuild your theme files and cached items by going to ACP -> Support -> Clear System Caches. Unfortunately, I am not seeing any issues on your community