Website design/layout messed up

Hi,

The layout of my website has changed all of a sudden without me implementing any changes. The discrepancies are not major but for example, the H1 heading on the home page has been positioned to the left even though I’ve positioned it to be in the middle.

The scroll up arrow has changed position and sits at the top left hand corner as opposed to the bottom right hand corner. Some pages have retained the original design and others haven’t. The design is not the same on mobile as it is on desktop, whereas before everything used to be uniform. Also it’s worth mentioning that the original design is present in Editor and Preview mode (I’m using Elementor), so I can’t even fix the layout issues there and then.

How can I diagnose where the problem is coming from and bring back the original design? Has WordPress changed its global settings which is why everything is messed up?

For reference, I’m also using the W3 Total Cache plugin and am not sure if caching plugins have the ability to change layouts. Please can anyone advise.

Many thanks

The page I need help with: [log in to see the link]