Right Sidebar shunted down to bottom left in Safari

Hello helpful people,

I’ve just received an e-mail (for which I am very grateful) telling me that my right sidebar is shunted down to the bottom left of the page when viewed in Safari.

I’m having trouble keeping up with all the html I need to learn as it is and I would be very grateful for any advice on how to fix this problem. Apparently, it also appears this way in Firefox but I use FF and it looks fine (also in IE).

Please help me…..

Er, the url might be helpful https://www.helengraves.co.uk

Thanks