After clicking “Read Less,” it does not scroll back up to the top of the text.
To solve your first problem you can generate a function which would do the UPSCROLL.
Almost every of Wix-Elements has the —> " scrollTo() " function.
Use it for your purposes. Generate a code which will run when you need the scroll-action to any element-position on your page.
Here an example for a button…
https://www.wix.com/velo/reference/$w/button/scrollto
While the box is expanded, the webpage allows you to infinite scroll.
For second problem you may want to provide an example SCREENSHOT or even better an example-VIDEO to show your problem, since it is difficult to imagine whats going on, on your screen.