Mobile website doesn't follow the pc version?

What are you trying to adjust? Content a web Part, Widget, included CSS/JS or perhaps just HTML?

First thing to check would be if it's cached on your phone.

Secondly you say it works on your pc browser, but is that the same browser you are editing the Admin with? As that would mean your in an editor context and your caches might be flushed for you. Or you have permission to see it. Check in a different browser, or private window if you see the change.

If it works you could try to mimic the Mobile view in your browser, using either dev tools or just making your browser smaller (assuming you detect mobile by viewport)

Thirdly sometimes separate data is shown for mobile. Check if you can update an item that is used on both desktop and mobile.

It doesn't seem to be cache on my phone? I tried cleaning cache, tried on private mode and a different browser.

It is the same browser yes (chrome/chrome). I tried cleaning caches on my end and in the website system, tried private mode and edge browser and everything still are ok on PC. I even tried on another session.

The preview tool does not really work?

For the separated data, I changed the text inside a webpart and it did changed on both end. So basicly the master page change isnt syncing?

what version and hotfix of Kentico are you using? Isn't it possible you are using different layout per device? Device profiles?

Alright, I found out someone added a mobile webpart at the wrong place and there was 2 UI webpart overlapsing eachother. So i found out my problem, sorry for that.

Can i ask how If there's a way to make the webpart stop overlapsing eachother or I need to minimize my window everytime? Or thats another token. On Kentico 10.

If the web parts are overlapping then most likely the issue is in the HTML code and/or CSS styles used. You should check the page template layout and your styles.