Hi there, Paul! Welcome back to the forums. 🙂
I just tried visiting that link and get a “Page Not Found” when I did. Is that page still live and accessible or is there perhaps another link I can check out?
To get the ball rolling in the meantime, will you please try switching to a default WordPress theme (like Twenty Fifteen) to see if the layout is broken there as well? Just want to see if perhaps the stylesheet for the current theme is taking over the widget styles and causing any issues there. If the layout is still wonky in Twenty Fifteen, then there’s something else going on for sure.
Thanks and cheers!
Geoff