Advanced Editor & Updating Changes Issues

Hi there

Sorry for the vague title but I’m not sure how to describe this.
I am making changes to our front page of our website. It is mainly text updates, the only real changes is the addition of a grid row with images, and extra text content. I am not adding in any new elements or plugins
However, when I created all my changes and published the page, it has somehow gone wrong? Elements are missing entirely, formatting has gone wrong and everything seems to be contained in color boxes when they are separate in the editor itself.

I have reverted back to before I made all these changes and theres no problem. I have checked this in Safari and Chrome, cleared history and cache, tried removing all content from the page and re-building it, and still this same series of issues occurs? It really is quite strange and I am hoping to get some help with it.

I have attached an image library that shows the front page when I have made all my edits.

View post on imgur.com

If you compare it to the frontpage currently you can see all the weird differences when there should be none. I have also attached a login for you to see. The edits that I have made, I have saved as a template called ‘New Front Page’.

Any advice is appreciated!