Website updates not showing in preview mode.

[emilyaugstudios]

Hey everyone, I'm running into an issue with my Shopify theme. Recently certain changes I have been making are showing on the back end in the customisation area, however when I preview these on the front to check how they look there are no updates shown at all. Image references below.

I have cleared my caches and restarted my laptop, plus tried viewing the preview link in incognito mode just incase but nothing is working and I can't see any changes being applied to the front of the website. All the changes I'm trying to make are main.css and theme.liquid related.

Struggled to find more advice or guidance as to why this might be happening, so any support would be appreciated. 

How the footer looks in the customise section (website backend) –

How it looks in preview mode, as you can see there are font inconsistencies and the copyright message still shows –