WordPress 4.5 has resulted in layout issues

I am running the Admired theme, which has been working perfectly until I upgraded to WordPress 4.5. Since I upgraded, the right-hand sidebar is being misplaced on various pages – it moves to the bottom of the page instead of being on the right.

These are some of the pages that demonstrate the misplaced sidebar…
– http://lazworks.azurewebsites.net/ (Landing page)
– http://lazworks.azurewebsites.net/lazworks-products/lazworks-business-manager/ (Product page)
– http://lazworks.azurewebsites.net/2016/04/14/microsoft-announces-public-preview-of-project-madeira/ (Individual article)

Articles displayed under a specific category seem to render correctly
– http://lazworks.azurewebsites.net/category/viewpoint/
– http://lazworks.azurewebsites.net/category/tips/
– http://lazworks.azurewebsites.net/category/microsoft/

Any help as to how I can resolve these issues will be very much appreciated. Please note that I am completely ignorant about any scripting or CSS commands, so advice needs to provide instructions and things I can paste (if that is what will be required rather than an update to WordPress).

Many thanks