Anchoring in HTML editors is not working properly.

OK, so the buttons do work but I think the problem is that instead of the anchor tag scrolling the section desired to the top, it scrolls the top of it to the center of the page.

You can add a function in Javascript to do the scrolling for you. Read more here;
https://www.google.com/url?sa=t&source=web&rct=j&url=https://stackoverflow.com/questions/4210798/how-to-scroll-to-top-of-page-with-javascript-jquery&ved=2ahUKEwidydfp5773AhXumWoFHTpHCaIQFnoECAsQAQ&usg=AOvVaw3kfjgFsS_wlmiM4Y5hVfl1